Topic: Optimal Bitcoin Mining Corp. now offering remote GPU use contracts! (Read 11188 times)

It's time for you to rest, and for money - to work. Our website

All these questions about future are really interesting... I think future of crypto overall is a very interesting and important topic.. and I want to learn more about it I found this one https://blockshowasia.com/

Okay I have repurchased Ben Walsh's 30 and placed a purchase order for 30 more bonds.

Hi Optimal.

You've made a mistake with your sums ...

That buy order repaid 36 of my 66 bonds.

That leaves 30 remaining.

I've put a sell order up for those 30 at the 0.69117647 BTC price.

I trust you will be buying these very shortly to conclude our business.

Okay, the funding problem has been fixed.  

So far 105 bonds were repurchased at 0.69117647 BTC and there is still a buy order outstanding for 36 bonds at this price.  Hopefully this will take care of the repurchase of all bonds outstanding.

or maybe she only put in a buy order for 1 share or somthng by accident

The rounding is only in the GUI. The back-end still uses the full eight decimal places. I think the offer may not have been filled because the account was not sufficiently funded.

also roundedup here plz get baxck to us with more details about whats going on?

Note: Order prices seem to be rounded up to the 7th decimal. My sell order @0.69117647 is displayed as 0.6911765. Needless to say, it wasn't filled by OP's offer.

The buy order's disappeared. It fulfilled on order for 10 bonds, then was gone. Are you still short on btc?

Okay, a buy order has been placed for 141 bonds at 0.69117647 BTC each.  Thank you everyone who bought bonds!

just checking to see for an update optimal

Ovidiusoft, thank you, yes, good idea.  This is what I will do once the funds clear.

I think a better method would have been to place buy orders @ 1 BTC/share, so in the end you would get all shares. By paying the 1 BTC as dividends, there will still be shares sitting around in different accounts, which is probably not what you want if you will need to reissue bonds or shares in the future.

You can still do this if you want. Place 204 buys @ 0.69117647.

Sorry, I'm only giving him 30.882352% credit. The contract stated that the bond would be repaid on or before December 1. He did not deliver on that promise, even if it was his intention and he failed for technical reasons.

I'm looking forward to remitting the remaining 69% credit once funds are received.

Great job guys..

Everyone likes to be in the loop... obviously..

I think optimal deserves full credit for delivery on his promises.

Nefario.

ty vary much optimal for replying and also upholding to your contract plz keep us informed on progress.

Good news:  I figured out a way to pay the shareholders and I have paid out 63 BTC today.  I am waiting for the rest of my funds to clear in the next few days and then 141 BTC will be paid out in full to the 204 shares.

63 BTC/204 shares = 0.3088235294117647 BTC/share paid so far

141 BTC/204 shares = 0.6911764705882353 BTC/share will be paid over the next few days

Thank you to the shareholders for your patience.

Optimal can we plz get and update on what you plan to do tommorow the 1st. i see that you have loged in everyday this week but still have not posted a reply.

id really like i reply from optimal about this. and what he plans to do hopefully he is a good bissness man and owns up to his negligence and holds true to his contract but we will see

So just to chime in on this, I've "reset"optimals account by transfering to a new one, and it seems he's having issues with his password. So I'm doing that again.

Having his assets switched to a new account does not copy transaction records to the new account, only all the assets, so he doesn't have access to previous transactions.

PS. I've begun development of the next version of GLBSE, I'm aiming for a testing release before new years.

Nefario

CONTACT OPTIMALBITCOINMINING
PM:Send private message
USER STATISTICS
Joined:Fri Jun 17, 2011 4:49 amLast visited:Wed Jun 29, 2011 7:55 amTotal posts:3 | Search user’s posts
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(2 Posts / 66.67% of user’s posts)Most active topic:Optimal Bitcoin Mining Corp. Bond IPO NOW AVAILABLE!


hmmm maybe thats his problem to lazy to log on to the glbse forum to let nef know he locked himself out? and he was last on this forum at 655 pm and still no responce from him i think this is looking more and more shady.

For future reference, GLBSE is currently fully accessible and the depth for OPTIMALBITCOIN asset is as follows ...


ben@ben-laptop2:~/bitcoin_stuff/bmc/black-market-client$ ./bmc.py depth OPTIMALBITCOIN
Enter passphrase:
 
bids --:-- [[1, 80000000]]
asks --:-- [[3, 89999990], [1, 100000000], [11, 100000000], [10, 100000000], [25, 100000000], [10, 100000000], [54, 100000000], [2, 110000000]]

just an fyi nef has been taking care of issuse last nihgt he transfered my old account for me so nef has been taking care of his end on glbse i belive that ootimal you should just own up to your own mistakes and pay your lenders what you disclosed in the contract that you provided.


edit as of checking it also seems the extra 2000 or so shares have been taking down hmmm how could that be unless you got your account info???


ps still waiting for a response

@dmcurser

Thanks for bringing this to the attention of myself and the other shareholders. Much appreciated.

@OPTIMALBITCOIN

I'd like a response from you on this. Nefario states in the linked thread on the GLBSE forums that he spoke to you recently. Are you saying that he did not ?
Nefario will be able to provide details of when the relevant accounts were accessed. At this stage, it appears you were able to remove the sell order if you wanted to.
The costs of your failure to do so should not be beared by those who invested in your endeavour in good faith.


EDIT : with -> who

Hey look as far as im concerned it is on you for your losses. you losing your api key and such is your problem. you cant change your contract anytime you feel like it. I do agree yes neferion was unable to responed to ppl for a while but i know i have talked to him on glbse about 5 times in the last two weeks and he has indicated on the glbse forum that he has spoken to you so this bs about im unable to contact him and such is just seeming like a poor mans excuse not to follow thur with what your contract agreement states.   


https://glbse.com/forum/viewtopic.php?f=17&t=50

I refuse to accept any punishment for the actions and behaviours in the business relationships between Optimal Bitcoin Mining Corporation and others.

I am responsible ONLY for the actions and behaviours in the business relationship between Optimal Bitcoin Mining Corporation and MYSELF.

Any issues you have with the GLBSE stock exchange are purely between yourself and GLBSE. You should seek compensation from GLBSE for all reasonable losses you incur.

The significant downtime is not just impacting you - I have been unable to trade (both buying and selling) shares when I wanted to - I have suffered losses as a result too, however, I took reasonable steps to mitigate the risk of such losses (which I considered to be HIGH given the clearly stated BETA status of GLBSE) - something any business does as a matter of course.

The term bond is very clear.

I agreed a contract with you which very clearly states that I will receive 1 BTC for the significant number of bonds I purchased from you at the time when they were first issued.

I have not purchased any subsequent bonds.

You are massively damaging any possible future business I (and I suspect many others) will consider conducting with you - including further bond purchases, other investment in your business (other businesses) and purchases of products / services you offer through your businesses. This is possibly the best form of anti-advertising you could possibly have come up with.

I demonstrated massive faith and trust in you, considering you to be an honest and trustworthy person.

The "rules" you mention are the contract terms and conditions we both agreed to when I purchased the bonds.

Not trying to be mean, but the GLBSE problems were only intermittent and in the past few weeks. It was your responsibility to cancel the sell orders on nov 1st or 15 or whenever you wanted. Nobody is "taking advantage" if you don't, and you are expected to stand by your contract, even if the shares are sold on Nov 30th, 23:59:59. Changing the rules just because you feel like it is childish.

So how about you take is as a business man, cancel the sell orders (GLBSE works perfectly now) and repay 1 BTC/share on dec 1st as per your contract, no matter when they were bought?

Full disclosure: no, I didn't buy shares in the past days, and I don't intend to buy. I have exactly 10 shares bought on august 30th.

It sounds like a fair deal but for next time don't issue more bond then you can sell simply issued in batches of shares until the market seems saturated. Nefario has been online and has been talking to the community recently, Please send him a pm on this forum and on the GLBSE and I am sure he can help you

Initially I was going to, but I now I see that people bought up a large amount of shares to try to take advantage of the fact that they will be repaid in 5 days and turn a quick profit.  This was never the purpose of the bonds and as I stated earlier, the bonds were intended to raise capital for the company.  Additional funds are of no use to me to have for 5 days at this point.  In any case, I have been unable to access my account lately and have been in contact with Nefario to try to access my account.  I have not heard from him recently, so I am taking the following course of action:

If Nefario does not get back to me by December 1st, I will have no way to access my account, thus the bonds cannot be repaid.  If Nefario does get back to me by December 1st, the bonds will be repaid such that only those bonds that were purchased in the 30 days prior to December 1st will be repaid at 1 BTC each and bonds purchased in the past 30 days will receive the original 0.9 BTC only, which (without being able to view my account) is about 163 BTC total.  There were 63.78 BTC purchased in the last 30 days, so a total of 219.7 BTC will be paid out, with each bond will receiving 0.97 BTC.  If the number of bonds purchased in the last 30 days is greater than 71 on December 1st, that means that people are trying to take advantage of me and, therefore, everyone will only receive 0.9 BTC at maturation on Dec 1st, and you can thank the few people that don't play by the rules for screwing it up for you, (this assumes Nefario gets back to me by Dec 1st).

Are you guys still planing on buying up the shares for 1 BTC each?

Today is Sept. 1st and bonds prices are increasing to 0.9 BTC!  Buy them while you still can!

This is pretty much the model that most mining companies on GLBSE have taken(exception being centimine). And I think if you're going to get into mining this is the least risky way to go. Thus far none of the mining shares on GLBSE have repaid their capital in profit.

I might add that some operations(SIN) the operator charges a managment fee, which may considerably effect the profitability of the share.

Quite honestly, I'm interested, but your info just doesn't work. If you WERE able to put this together with the numbers that you provided, and everything went according to plan, then it might be possible to make money. I see this as flawed as you are "over-estimating", Your numbers change (slightly) per post, and the overall net is not high enough to offset the startup and upkeep as you would otherwise not profit much. Not to mention your "investors" are the ones bearing the costs, not you; if something goes wrong, or profitability disintegrates before your eyes you can just disappear, along with any net and tech.

I may seem naive, inconsiderate, or speculative (well I AM speculating) but without even thinking about the numbers, there are holes

Last chance to purchase Optimal Bitcoin Mining Corp. bonds at 0.8 BTC!  On Sept 1st the bond prices will be increasing to 0.9 BTC!  Get them while they're hot!  Four Computers currently available for rental!

We just had another satisfied customer rent 3 computers for 1 day.  Once again 5 computers are available for rental if anyone is interested!


Actually you might be surprised.

Amazon does not offer Cluster GPU computing for Windows, I do.  Amazon only offers Cluster GPU computing for Linux on the US East Coast. You also did not mention that Amazon charges for data transfer, which I don't.  You cannot pay for Amazon in Bitcoin, as far as I know.  I don't know about you, but I would rather pay 0.14 BTC/hour than $2.10/hour.

Comparison:  
nVIDIA Tesla c2050:  1288 GFLOPs Single Precision/ 515 GFLOPs Double Precision  3 GB RAM
AMD Radeon HD 5870:  2720 GFLOPs Single Precision/ 544 GFLOPs Double Precision 1 GB RAM
AMD Radeon HD 5970:  4640 GFLOPs Single Precision/ 928 GFLOPs Double Precision 2 GB RAM
AMD Radeon HD 6870:  2703 GLFOPs Single Precision/ 675 GFLOPs Double Precision 1 GB RAM

My machines dominate Amazon's nVIDIA Tesla machines in Single Precision calculations and my machines also win in Double Precision Calculations. Amazon's machines have greater CPU computations, but if you are renting for GPU use, as long as the CPU is not a bottleneck, it does not really matter as you need to compare GPU performance, not CPU performance.  The only real difference where nVIDIA Tesla have an advantage are more memory, which tends to only be a concern for rendering applications and not if you are using them for GPGPU applications such as password cracking, etc, so it really depends on the application.  Even so, the rendering capabilities of my machines are nothing to sneeze at and I can tell you they would perform quite comparably to the Tesla machines.  

My current machines use the following hardware:
1: HD 5970 and one HD 5870
2: one HD 5870 and one HD 6870
3: three HD 5870s
4: three HD 5870s
5: two HD 5870s

Each machine has either 4 GB or 8 GB of 1333 mHz RAM, a 2.8 GHz, 3.1 GHz, or 3.2 GHz Phenom II x4 or Athlon II x4.

Investors and those concerned about any advantages that nVIDIA cards might offer for rendering applications should keep in mind that I have a deal to get 40% off nVIDIA cards for my new cluster, half of which will be built using nVIDIA graphics machines, and include nVIDIA Tesla cards and GTX 590s to cover this base.

If you have specific hardware requirements let me know what they are and I will make sure they are included in the new cluster that is built, which will be very competitive with Amazon's specifications and rates and most importantly, we will accept Bitcoins.

I cannot spend any more time discussing hardware specifics.  If you are interested in using service or investing in my company, that is great, please let me know, but otherwise please do not waste my time asking questions that you can figure out yourself.  If you would like to make a larger investment than simply bonds on GLBSE, please send me a PM.

Possibly, I haven't yet used this service, so I won't comment on it's quality, but try getting the service from Amazon anonymously and paying in Bitcoin.

For Bitcoin businesses, the more costs they can meet through Bitcoin the better and the lower the volatility of Bitcoin price as a result.

I should imagine Amazon offer a far superior service, and for $2.10 per hour.

Now I've realised what the problem is ...

You are assuming the only use people would put "remote GPU use contracts" to is mining Bitcoins ... there are numerous uses for GPU clusters - Bitcoin mining is just a tiny fraction of what people are doing with GPU clusters.

Take a look at the OpenCL and OpenGL projects.

If I only needed a GPU cluster for a couple of hours in total, I would definitely consider making use of something like this, at the right price.

Perhaps OptimalBitcoin would like to reply with how the machine specs available at $1.50/hour compare to the equivalent provided by Amazon in terms other than Bitcoin mining performance ...

"Cluster GPU Quadruple Extra Large 22 GB memory, 33.5 EC2 Compute Units, 2 x NVIDIA Tesla “Fermi” M2050 GPUs, 1690 GB of local instance storage, 64-bit platform, 10 Gigabit Ethernet"

You also have the benefit that you can pay for these in Bitcoin ... I could easily see a Bitcoin business formed around using these in a "on-demand" fashion for something like an online video encoding service for example.

OptimalBitcoin might also want to consider further time/money investment in promotion/advertising of these "remote GPU use contracts".

Yes indeed, but this relies on people being stupid enough to pay so much. You won't get many repeat customers once they realise they lose coins overall.

As previous posts seem to indicate that unrented GPUs are mining rather than switched off / idle - they are getting a return at all times ...

Let us be generous and assume 3 x 5830 GPU gives 1000 MHash/s ... that's ~0.6BTC / day (at current difficulty of 1805700.8361937), so ~$6.60/day (at $11 USD/BTC).

The current quote for the "remote GPU use contracts" is $1.50/hr for those 3 x 5830 GPU, so $36/day.

Whenever there is an offer for "remote GPU use contract" that is greater than ~$0.46/hr, it makes more sense to stop the mining and have them work on the "remote GPU use contract".

This business model is flawed. If the miners are at all profitable, it doesn't make sense to rent them out. It only makes sense if mining is not profitable.

For example:

If I rent a computer from you for 24 hours for 1BTC, and I manage to mine 2BTC, then you lose 1BTC. You would have made more BTC by not renting it to me and simply using it to mine and keep the 2 BTC for yourself.

If I pay you 1 BTC to rent the computer but I only manage to mine 0.5 BTC then you gain 0.5 BTC.

The correct business model is:

Float the company on GLBSE with an IPO to raise the investment you need to buy enough computers to fill all availble space, then the company mines using this equipment and pays out any profits after covering electricity costs to shareholders. You do not own the company in this setup, the shareholders do, but as long as you keep 25-50% of shares then you keep 25-50% of all profit made, and use none of your own money to buy the computers.

If the company needs to liquidate (eg mining is no longer profitable), then you sell everything you bought with share capital and buy all shares back from shareholders (including your own shares) at as close to the initial IPO as you can afford with the proceeds from what you earn in selling the equipment.

Update:

Our first customer received service and was happy with the service.  Their contract has ended.  I currently have 5 computers available for rental and am looking for new customers.  Please send me a PM if you are interested!

Don't be silly.  Obviously I can't tell you that, because if I did there is a good chance they wouldn't be available anymore.  But I can tell you that the new cloud computing company is going to be half AMD and half nVIDIA hardware and I have a deal to get 40% off all nVIDIA hardware!  I am still sticking with AMD for half because I want to build an OpenCL cluster and I prefer AMD hardware myself.


This is good to know for sure.  I wish you luck as well.


I just finished closing my first customer.  I am charging 0.107 BTC/hour/computer.  I am making 25.7 BTC revenue renting one machine for 10 days.  ($360 revenue - $27.46 electricity costs=$332.54 profit)

Using the machines I have now, I have mined 604.3 BTC since 4/5/11, from which I have made $7203.  I don't have the exact electricity costs right here, but they cannot be greater than $1700, they are probably around $900, so profit is about $6630.

I am always looking for new customers... if anyone needs this service, please let me know!  Don't be shy, I know you are out there!  I still have 4 computers available right now and more will be available in the near future!

Where are you getting 5870's, and how much are you paying for them?

No, no. Fully funded out of my cash flow. No intention to go GLBSE - first, here may be legal issues (we are a REAL company, registered with local laws)... I would have to make it a stock company (which Idont wnt) and hen GLBSE is not a real exchange for real stock at the moment, according to the law. There could be issues.

Second;) I just dont need investor funds at this stage.

Third, I am still in a phase where I can jsut call it off.

Fourth, seriously, GLBSE would not get me funds worth the effort. I like how someone here collected 15.000 USD equivalents, but I am investing about that amount every month.... GLBSE would have to pull ina a 100.000 USD value to make it worthwhile. I dont see that at the moment.

I may decide to change that, though.

Is your company floated / going to float on GLBSE ?

I can only wish you luck with that and once I havel ess stress we should see what you do marketing wise - I may be able to replicate this on our side of the globe (europe based) and we may be able to strike things in two markets... possibly with the same technical basis.

I am with luck (final negotiations with the power provider are happening while I speak this) signinf the lease on our data center. We got 350 square meters for a decent price (will be co-used by some import/export venture I am playing with) and a contractual guarantee to draw up to 500kw power from a trafo station that is 20 meters away Once we sign that, until end of August I plan to being 2 racks of 48 cards each online - then seeing how it goes on the AMD front either adding 48 per month, or waiting a month or two for the 7xxx series.

As a note: you can safely draw more than 80% of the amperage of a fuse.... if you prepare for that from the start. Most wiring is not prepared for that.

Together this should be a significant capacity either for mining or as OpenCl cluster - the later only needing actually customers.

I am potentially interested in buying more bonds, however, I need some financials from you ...

How many customers have you had so far, what is the total revenue from them and what is the total profit ?

Latest update:

Currently the difficulty is increasing by 8.5% per 10 days.  I measured the power draw from each computer to get a more accurate idea of power requirements.  I found the power draw to be much lower than expected.    With these new calculations I can mine profitably after cost of electricity for another 4 months, until approximately November 26th.  The profit made until then at current rates cannot justify the cost of purchasing new hardware therefore I am renting out these computers for GPGPU computing, which are remotely accessible.  Also, instead of building a cluster for Bitcoin Mining, I am building a cluster for distributed GPGPU CUDA and OpenCL computing.  The costs and profits detailed above are correct, except the electricity draw for each 4x HD 5870 machine would be about 900 W.  This now allows 42 computers in this space with a 400 A service utilizing 80% of capacity.
$0.14*0.9*7*24*42=$889.06/week electricity cost
$1.5*7*24*42=$10,584/week revenue
10584-889.06-180.63-39.51=$9474.80/week profit
$492,689.60/year profit

I have found several people who I will be working with to set up the cluster and I am teaming up with NetTecture to provide additional capacity in case either of us receive a larger order than we can handle.  If you are interested in a buying a contract send me a PM and I will be happy to set it up for you right away. 

Bond offerings via GLBSE.com have not been very effective thus far, so I am securing other sources of capital, however the bonds will still be available for purchase until September 1st. 

Can we get an update on this please ?

Bumping so we see both threads.

How would the online gambling work for US residents? Didn't they just do a huge crackdown on online gambling recently, and freeze a ton of accounts? Wouldn't using bitcoin for gambling just draw more negative attention?

I agree, I simply stated that as a realistic scenario. Plus if difficulty slows it means the BTC's value is staying too low for it to be profitable for most people, which doesn't bode well for someone starting a $50K mining operation. The OP, or any potential investor, has to take both price and difficulty into consideration. And since those two factors sort of feedback on each other it is pretty hard to do. His original calculations were far too optimistic. Mine as well is not as pessimistic as some fairly realistic scenarios (difficulty continues uppping, but at a slower rate, while price steadily falls to or below $7 / BTC).

The only people who might have a good case for jumping in big now are those who live where electricity is < $0.08/kwh, and who can cool a big setup cheaply. Other guys will dump their hardware cheap once the BTC price no longer pays back electricity required to produce. The people with cheap power will buy that hardware cheap and produce bitcoins cheap. So that is also a potential scenario where difficulty would still continue to increase (I still think it would increase slower in this scenario as well. After the next jump I think the increases might be lower than 30%).

My guess is the difficulty WILL continue to rise until the electrical cost to produce BTC about meets the value of BTC in meatspace currency. Luckily the OP is on the cheaper side of things in terms of global electric costs (but still higher than the US average of $0.10/kwh).

And he still hasn't addressed the ownership in case the venture fails. Do investors get paid back through the sale of the hardware? And why would he still choose risky mining over Plan B if Plan B is more profitable?

Captain, extrapolating difficulty increases without accounting for profitability is stupid. There is no way that difficulty will continue to increase at 30% every 10 days unless the price goes back up to 30 or more. Notice how many people are selling used 5830s now in the forum. This is a strong indication that people are reluctant to add to capacity now and that difficulty growth will almost certainly slow. I think the real threat (and reason that I wouldn't invest) is that price could stagnate or fall somewhat, leaving people with big new investments in the lurch.

I wish someone would come up with a better use for GLBSE than mining. If someone trustworthy listed a somewhat professional sexcam or gambling site there, I would be eager to invest my coin. Bitcoin users almost all young men -> porn/gambling are perfect target markets.

Also, in my city the actual electricity bill ends up being about 2x higher than the $/kwh rate that is advertised. This is because you pay for taxes, flat fees, and then "delivery fees". My electricity supply is only $0.11/kwh, but my overall bill is more than double that.

Have you taken that into account? What the overall monthly electricity bill would be after all fees, surcharges, taxes, etc?

That electricity will jump to 135% of revenue seems absurd to me.  How much of mining is conducted below ~$0.12 KwH with no other costs in terms of hardware depreciation? It would have to be a large fraction for a near-term movement like this where electricity cost > revenue at $0.16 per KwH. I think it will take about a year for mining to move to low cost locations, so they might have a timing window though I agree that it is dodgy.

People who set up ops in areas where electricity is heavily subsidized such as the Ukraine [$0.03 per KwH] have the best investment prospects.
http://en.wikipedia.org/wiki/Electricity_pricing

Note: I am not suggesting that anyone send coins to Ukrainian scammers who set themselves up on GLBSE. Just that if you live in the Ukraine, investing in mining is probably still a good idea.

Edit, my calc's were a smidge harsh, but still pretty much made sense

1x 5830's = 260Mh/s
40,000Mh/s / 260Mh/s/card = 154 cards
@5 GPU's system: 154 GPU's / 5 GPU/sys = 31 systems
31 * $1,345 = $41,695

+ deposit + rent + AC + fans + electrical installations + internet + racks + networking equipment + KVM's + surge protectors


If you are making a profit with your current total of 15 GPU's you should consider yourself really lucky and just mine those until it's no longer profitable. Then put all your money into Plan B.

I can't tell if your post is a joke, or a scam or if you simply haven't thought it through.

How can the computers you described only cost $900? Even if you had all the other parts and only needed to buy the 160 5830's needed to reach 40GH/s, you'd spend about $180 per GPU. One hundred sixty Radeon 5830's at $180 a piece. I suppose that's about the going rate for that card right now, if you could even find them for sale. Now you need to assemble all the other parts for 32 systems: Athlon II X4's, 4gb ram, DVD drive (pointless for mining), cases, motherboards, 1200W power supplies, fans, and PCIe riser cables. The case you linked to won't hold 5 GPU's without mods. Add $ for that, even if it's just shelves to prop up the cards.

Parts:
mobo   $130.00
PCIe extenders   $30.00
ram   $25.00
PSU   $180.00
case   $40.00
hdd   $20.00
DVD   $20.00
cpu   $80.00
Fans   $20.00
Total: $545 without video cards
Total with video cards @$160 each: $1345
x40 = $43,040.00  just for the machines alone.

Good luck getting all those parts and the video cards, for that price in under a month. The price of a bitcoin has already fallen from $20 to $15 and it's only been a day since you made this thread. Counting on the price to stay steady is crazy with something as a volatile as bitcoins. The difficulty will adjust more than every 14 days. More like every 8-10 days. At that rate the difficulty will have already increased AT LEAST 3 more times between now and when you finally get up and running (this assumes you are able to raise money and get your operation up and running at an above average speed). So by the first week that you are up and mining, electricity will already be 87% of your revenue (assuming bitcoins are still $15 at that time, which could go either way). After your 10th day of mining electricity jumps to %135 of your revenue. From then on out who knows what happens. People will begin to drop out of mining so you drop out so you might put your operations on pause or just keep mining with the expectation that you might lose money for a while while you wait for people to drop out.

Also consider that 40x of these rigs, is going to put out about 29,000W of heat. I'm basing that of actual measured power draw from my own system with 2 5830's, extrapolated to 5 cards. That's 115W/sqf, which is in datacenter territory. You should research what spec of AC you actually need to cool off this kind of heat. And be careful to not use more than 80% of the max amperage for each electrical circuit.

Good luck finding investors who will invest in a plan where the #'s already exceed your planned costs, and that will begin to lose money after about 10 days of getting the operation up and running, and only get worse from there, or stay near a barely break even point. Then how are you going to deal with liquidating your "company" when you go under? I'm assuming you're going to either start an internet gaming center or sell the PC's.

If your plan B were more profitable than mining why would you not just jump straight to plan B? I'm guessing it's because you expect a bunch of strangers online to pay for your hardware so you can actually do "Plan B". But if Plan B is as well thought out as Plan A, you should assume there will be a high probability of that plan failing within the first 45 days. Would the cash from liquidating the hardware be split evenly among the bondholders? Or do you for some reason get the privilege of keeping the hardware and/or cash and leaving the suckers, i mean, investors, high and dry?

Note: i assumed 260Mh/s per 5830. I guess if you overclock you could get more than that, but you'd also be using more electricity and generating more heat so that would only at best buy you about another week of operating before you start losing money.

Why not just solicit shares for plan B if it is more profitable?

Cost per kWh is $0.16 at this location.  We determined that at $20/btc, we will be able to mine profitably until the difficulty reaches 4800000.  Once the difficulty reaches this level, if the value of the bitcoin is not higher than $20, we will switch to our plan B, which we are not ready to make public yet, but I will say that plan B is not dependent on the bitcoin at all and is more profitable than bitcoin mining.

How much US$ per KwH in your location? In the long-run, this will be a deciding factor on who is driven out of the business.

Hi I'm optimalbitcoinminingcorp - you might recognize me as dubious on IRC around the bitcoin channels. Teaming up with me is AnonX, who is a recognizable user on the bitcoin-IRC channels. Additionally, I have been speaking with Nefario over IRC to prepare this IPO for launch. (he can verify this as well)  I'm very excited to announce Optimal Bitcoin Mining Corp. a new bitcoin mining business, which is the first bond offering and largest IPO on GLBSE.com to date.

Currently, I am running 15 gpus at around 4 Ghash/s, so I've invested about $5.5k of personal funds and I am looking for bonds as loans to expand my cluster to around 40 Ghash/s.   I would like to raise $45k for expansion funds within the next month.

We are issuing 0.8 btc bonds that mature at 1 btc on or before December 1, 2011.

The way this venture differs from those that exist so far is that as far as I know, this is the first bitcoin mining company in which 10% of the total profits will be donated to a few different charities including at least one aiming to benefit the Bitcoin community. The specific charities have not yet been determined and I will allow the investors to make suggestions causes they would like to see benefit. The idea is that with the recent negative publicity surrounding Bitcoin in the US news, it's important for our image to be redefined in a more positive light.  I see great potential in Bitcoin for the future and I don't want to see U.S. government regulation ruin this for everybody.  Additionally, this should encourage a "feel good" mentality that comes from giving to others that should benefit the bitcoin community and cause it to grow in countless ways, while increasing chances of survival.
Here are our numbers:

Each computer will be built primarily with mining in mind, but also with some consideration towards retaining high resale value.  Each computer will contain approximately 5x hd 5830, 3.1 ghz Athlon ii x4 processor, 4 gb ram, 16 gb sd card, 3 coolermaster sickleflow 120 mm fans for case airflow, dvd-rw drive, thermaltake v3 black edition case, 1200 W power supply, motherboard that has slots for 5 graphics cards, 3 pci-e extender cables
The space used will be a commercial space 350 sqft., approximately 10-15 minutes driving distance from dubious, who will be taking care of installing and maintaining the equipment and costs $350/month to rent.  At approximately 20 computers there will be an upgrade cost of about $4,000 to upgrade the electricial system to support the additional load.

Here is a picture of the 350 sqft space:


The ceilings are 7.5 feet high, but this will be sufficient as the server racks are 6 feet high.  We will be using this space to begin with and if it turns out we need more space, there is a 250 sqft space next door that is vacant.  The debris on the floor and all dust will be vacuumed out before we move in.
To prevent the systems from overheating, there is air conditioning in the building that will be turned up full blast, plus we will be building a ducting system that directs heatflow out the window.  If needed, a portable air conditioner or window air conditioner can be purchased cheaply to cool a space this size.
The cpus will not be overclocked, but the core clock of the gpus will be increased to the highest tested stable frequency, and the memory clocks will be underclocked as much as possible to reduce power consumption.

Each computer will cost approximately $900.  Only one monitor will be purchased for the whole system along with kvm switches daisied together to reduce total expenses.

We have compiled several Excel spreadsheets that I put into Google docs for investors to view.  We expect difficulty to continue rising at around 50% per two weeks.  At this rate and approximating the value per bitcoin to be $20, bitcoin mining will remain profitable for 2-2.5 months.  In this amount of time, we expect to make $14858.49.  However, there are several different cases: if the bitcoin value goes to $50 we make $70,000 over this time period. ($30->$33,238.93 and $40->$51,619.38)  In the case where the bitcoin drops to $10 we run a loss on our hardware of -$1,845.44.  In case the bitcoin does not retain value, we have a plan B.

Here are our numbers:
https://spreadsheets3.google.com/spreadsheet/pub?hl=en_US&hl=en_US&key=0AmTXg8oCxjy5dDRYa3NPNDVlMnBSR2E2LV9VOHZWRlE&output=html

You can buy the bonds by creating a new web account for the web client for GLBSE.com here: http://dev.glbse.com:4567/client/index.html
Then generate a key pair and register, deposit some bitcoins and you are ready to go.
The asset ID is cbc7c9f999f94665e599d0ab0e144e1953e40d399a0f9191b91b843db4bb92da
The Ticker Symbol is OPTIMALBITCOIN

If you have any questions about getting started, concerns or feedback you can post them on this thread or email us at [email protected].

Thank you for taking the time to read this and stay tuned for further updates!