Topic: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING*** - page 192. (Read 576936 times)

I apologize if this has been covered, I tried skimming the thread, and may have missed this. I'm a software guy, not much on hardware, EM emission & noise safety precautions. Can someone please point me to a thread or some resources where I can take the necessary precautions to prevent health risks to myself and those around me? I plan on operating both a BitFury Full Kit, and a HashFast BabyJet in my 1 bed + den apartment. Would I need to purchase special casing/shielding etc to prevent health risks? If I ran both these units in a small well-ventilated den, and I stayed away from the room for the most of the time, would I be ok? Also, if it were to burst into flames, is there some auto-sprinkler device or some shielding I can use to prevent burning my landlord's building down, in the event no one is present?  Any resources/threads on this would be very appreciated!

EDIT: I skimmed the thread more and nobody commented on bitfury's post about EM emmission & noise safety... And this disclaimer came from BITFURY himself!

However - as my opinion whether you are recommended to buy or not buy - I don't know your regulations there and suppose they're quite strict, like FCC stuff and EMC tests. Until for example proper measurements of equipment are done - it may be risky to install many of these near yourself due to electromagnetic emission and noise. So either properly designer board and/or filters and/or shielding is required. I hope that this would be clarified soon. This is also true for homebrew devices that you make and don't care about switching noise such devices produce (like I saw in some DIY stuff where powering of such high-power chips are done in absolutely insane ways, or like problems with other asic vendors, you know them by the way likely, where their shipments were banned by customs due to these violations).

Anyway, as far as I know Dave has as well options to install miners in his location - this would be likely safe in any way, and maybe if you install these - before proper measurements done (i.e. in special laboratory with antennas where typically EMC measurements are done) - this maybe risky to install at home,  or at least close to you - so don't sit near miner 24x7 and don't put those close to you.

You should care about that and do not put your health into unnecessary risk. However I suppose Dave will do his best to solve these issues and make device fully compliant for safe usage. However that still won't mean that such equipment can be installed in bulk at home, and should be spreaded in space for maintaining safely low electromagnetic noise. Likely also undervolted boards is nice choice for safety, but all of that should be measured, and likely will be measured, the only delay could be there (and it is basically your choice) that such measurements could take additional time and can't be done before August timeframe. This depends.

..alright...who's buying up all the components? (ignore me if you don't know what i'm talking about  )

..alright...who's buying up all the components? (ignore me if you don't know what i'm talking about  )

Are your boards using an external clock? (as opposed to the chip internal clock I mean, not a user-provided external clock)

Our boards are designed for max efficiency.  They are running the chips at exactly the most profitable value point watts/dollar.  If you want more hashes you should buy more hardware.  Now that being said, a lot of people don't look at it this way - this is a perspective more suited to a very large private mining operation that intends to run far into the future.

Its true that our boards are hardwired to a certain clock frequency.  We've got them running about 440Gh/s gross hashrate.  After errors, tested nonce rates are seen at 410 - 415Gh/s.  That's probably about all you are going to get out of them.  You can gain some watts efficency by turning them down...certainly this will become a factor some day, depending on what you pay for power.

I know there is a *lot* of interest for an overclocking rig and I'm working on it.  Can't share details yet, as I'm under NDA, but something cool is coming.

Our boards are designed for max efficiency.  They are running the chips at exactly the most profitable value point watts/dollar.  If you want more hashes you should buy more hardware.  Now that being said, a lot of people don't look at it this way - this is a perspective more suited to a very large private mining operation that intends to run far into the future.

Its true that our boards are hardwired to a certain clock frequency.  We've got them running about 440Gh/s gross hashrate.  After errors, tested nonce rates are seen at 410 - 415Gh/s.  That's probably about all you are going to get out of them.  You can gain some watts efficency by turning them down...certainly this will become a factor some day, depending on what you pay for power.

I know there is a *lot* of interest for an overclocking rig and I'm working on it.  Can't share details yet, as I'm under NDA, but something cool is coming.

Here's my latest calculation based on current stats for oct end delivery, very difficult decision either way.  However credit must be given to buzzdave and team on how they handled the retail sales so far, compared to avalon/bfl/terrahash etc..it's night and day.  

1) Assuming a 35% difficulty increase per 2016 block until Nov 1st delivery, this is very reasonable considering the massive amount of hashpower coming online during that time from all the asic hardware delivery from asicminer/bfl and avalon chips etc..not to mention the large farms coming online.

Starting difficulty at Nov 1:  50,000,000 * 1.35 *  1.35 * 1.35 * 1.35 * 1.35 = 224,000,000

2) Assuming btc price remains flat at average ~$110, also a reasonable assumption given the price history for the last few months.

3) Assuming only a 15% difficulty increase per cycle thereafter over the next 12 months from Nov 1 2013 to Nov 1 2014.  I think this is a very conservative estimate given the amount of asic hardware/development coming online, lets just assume best case scenario and things will level off in the next 12 months and averages out at 15% per increase

Profitability decline for 12 months:  0.00948604

4) Putting it all into the final calculator with a starting date of Nov 1st per above:  

Bitcoin Difficulty: 224,000,000
Hardware Cost:  $8000
Hash Rate: see below
Profitability Decline: 0.009
Time Frame: 12 months
USD/BTC: 110  
Ignore all power usage cost etc..

RESULT1 using 600GH:  $11345.29,  minus the $8000 hardware cost, ~ $3300 profit over 12 months.  

RESULT2 using 400GH:  $7590.89, minus the $8000 hardware cost, ~$400 loss over 12 months.

Of course it is a given if the difficulty per cycle goes up by even 1-2% profit will be wiped and if actual is lower then more profit, same goes for $ per btc etc..

again this is just my best estimate based on reality not some fantasy numbers...

As i said, very tough decision buy or not...

well this is what buzzdave said, if the chip is capable of 2.5-3GH why would they clock it at only 1.5GH? it makes no sense, also i remember reading that the 400GH in the description is just that a description, the actual hashrate is higher per the chip the actual hashrate capabilities?  No?

anway all remain same but using 400GH in the calculation over same 12 months, this turns into a money loser generating $7590.89 over 12 months: ~$400 loss

#2 chips are capable of over 3Gh/s under highly controlled conditions, but our boards are underclocked in order to avoid issues described many times in this thread.

I'm making no promises here, but Tytus is seeing peaks of 130+ Gh/s from his 4 card rig.  This could be just a phenomenon of pool stats.  I see 101 Gh/s at this time.  He's sending to Slush, so I can't provide a link to the stats

and just how are you going to overclock it with every piece of it at it's limit? liquid nitrogen? voodoo?  

surprised so many people dont like the 600GH number, that was one of the easier assumptions. BuzzDave has said multiple times in this thread and even their website indicates the chip is capable of 2.5-3GH per, the $8000 kit has the per chip hashrate at only 1.5GH.  At 600GH it's about a 50% increase from the kit description which rates the chip at 2.3GH per - i thought that was a very reasonable assumption.