Topic: A4 Dominator - Pre-Order Group Buy - 280mh, roughly 1000w, $1800 + shipping - page 72. (Read 122571 times)

Does not apply to Titans need 2 psu's of imho at least 860 platinum and above and the y adopters that is the deaf to standard for titans. All working units I know run this way unless you use my server hack

I am right with you.  It still boggles my mind how this all came to be so quickly and is continuing to be even more relevant each day.

It is definitely not something I count on for any real money.  Some people play golf -- I like to mine and trade scrypt coins - lol. 

Problem is that I think others look at mining as easy money and it can be very addicting -- practically like gambling. 

You won't get rich from this unless you have the funds and know how to be a key player.

Makes sense. Sounds like you've got your priorities right taking the attitude of hobby, beer money etc coz there is not a lot you can control really and lots of variables.

For me, I find the learning/educational aspect of the technology amazing. People making electronics to effective "print" money or generate this "thing" that you can exchange for real stuff. Imagine explaining that to your grandma!

Mining has always been a hobby for me -- but my time right now is focused on my business.

Exactly, I have my stuff running all the time. The only rigs I have decommissioned are those which can't produce enough return to pay for their electricity.
The A2 is not yet at that point, and the A4 is significantly above that point.
Why just have the miners sitting idle. If elect is too expensive in your area, then you should cash-in on the resale value of the HW.

Those A2s still look good to me.  I may have to pull those heavy suckers out of storage and set up another farm.
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Are you saying that you have them dormant at the moment? Wouldn't people have miners running all the time to make at least something from some coin?

When I was trying to get Titan to work, I used single G1600.
I wasn't sure how reliable hooking 2 different PSU's into the Y-splitter would work.
Ive heard some people had success, but it's not recommended on forums such as tomshardware and others who talk about feedback and un-reliable/stability issues with such a config. They also talk about blowing out one or both PSU's when wiring in parallel.

Titans KNC said need 2psu's. My dual in one backplate psu are made to run dual. With the capacity I should easily run 6 cubes. Because of such no splitter with psu leads. Direct not modular at backplate and 15awg wire too boot. No adapter of the y type. Cool to the touch less heat and fail points with morale psu's and less connection fail points. W/o y adapter

anyway my view

Ive never used 2 PSU's together in the same rig before, im just worried about stuff like onr PSU back feeding into the other if their +12V signals are slightly different.
Ive seen titan use a pcie splitter but I was nervous about hooding 2 PSU's together in parallel this way. Ive seen issues with batteries in parallel where one battery is lower than the otherr and the first drains to feed the second, and im wondering if the same would happen when you plug the PCIe ports together from different PSUs. Since these are not batteries, it may cause current to flow between the PSU's instead of into the  rig.

Well hell you'd think so...don't know too many units that expect to use 8 slots on a psu w/o either y psu adapters (2 lines into plug) or
just 2 psu's.....I mean you probably could use 1 psu..but myself (for reasons stated with use as titan psu backups and swaps perhaps in previous post)
I'd always use 2 if I could....

as to my server psu plug in the previous post these are 2 server psu's plug'd into the backplate..each is platinum 1280 watts each....they ACT like 1 psu however
and you can get better 15 awg backplates and/or just put 15awg wire on them yourself (thou I think 16 awg is plenty the backplate I have came with 15 awg)

so anyway my way of saving bucks ...I think they go for 120 with shipping on ebay now (got mine cheaper for 100 bucks about) mine were also new with backplate
cabling etc was 300 bucks and works great.

anyway I guess the backplate is the issue ..I think they are common? For details on this kinda thing ask Maxumark he has made a few
but that is what I'm probably gonna go with from now on for running my rigs...works great half the price of 2 corsair 1200i psu's ...so wth

Im still wondering if you can use 2 PSU's per rig.
If so, then I can re-use several of my PSU's from other rigs I have decommissioned.
That will save me the net cost of purchase.
I already have a Lepa G1600, which will cover one rig, and a Seasonic x-1200, which should cover a second rig.
I have several 1000, 850 and 750's left over, which I would like to cobble together for the other rigs, but that depends on being able to use multiple PSU's on a single rig.
Im thinking all I need to do is tie the grounds together for the PSU's for a single rig, then I could use multiple rigs and I won't have to purchase any more PSUs, but I haven't heard back from anyone saying if that is possible.

Again I have not pulled the trigger on an A4 but doing the numbers I get this. (I am using the free below calculator to do so)

www.litecoinpool.org/calc


I'm using the following figures (hosting 12c kwh w/fees) at 280mh and 1000 watts (been my experience asic's always run higher watts then the specs)
at $4.10 LTC price I get the following

A4 price of with shipping ($2,000 usd?) add MY dual 2560 server platinum psu rigs for total of 300 bucks (maybe double that if 2 psu's at your end) I get $2300 complete.

the link to the hack to do so below ..and you can either get a heavy duty backplate (15awg) or just add your own as a previous poster mentioned to make such 15awg when
modding the backplate.

https://bitcointalksearch.org/topic/m.15533861

24 hours   2.80509961 LTC   11.50 USD   2.88 USD   8.62 USD
7 days   19.63569727 LTC   80.51 USD   20.16 USD   60.35 USD
30 days   84.15298828 LTC   345.03 USD   86.40 USD   258.63 USD

So ASSUMING by some chance difficulty was to remain the same (snicker) or maybe by circumstances of LTC price and difficulty rise balancing out to the same (snicker snicker)

I get 8.89 months for ROI.....

Kinda ugly ...and my server psu rig is 1/2 the cost of what I'd get instead ..that is 2 corsair 1200i's at 300 usd each Newegg (on their monthly sale) so sheesh...MAYBE you could
run this beastie with ONE PSU..my experience with Titans I'd rather run 2 Corsair 1200i's and over kill with their 16awg wires running 1/2 and KNC PSU splitters additional protection.
A corsair 860i would probably be over kill but I have Titans and switch around so would need the Corsair 1200i's etc in case if not running the above server psu hack in the Jupiter case.
Thus my savings of 300 over what I'd spend ..just saying..

With the expected difficulty rise in LTC from the A4's and the sale to the big boy data halls before us (investors they got) we need a heck of a lot better price point then $4.10 ltc imho

anyway just my view on pondering this...but damn we need BTC to pump and LTC to follow damn it !

If the total requirement is for 1KW, over 8 PCIe plugs, that's 125W per connector, which at 12V would be between 11A-12A per connector. Given 3 positive leads in a connector, that's a requirement for a min of 4A per wire. 16AWG wire carries just under 4A, so you would need 15AWG or better per pin to be just on the safe side.

Im going to use a LEPA G1600, which has 4x 30A 12V rails, so each rail can be easily split into to 2x 15A PCIe plugs. Im going this route because I have some left over from other miners.

You could basically run a 100A 12V supply and split that into the 8x PCIe plugs also. Those are pretty common as "server" power supplies, but I have noticed that they often don't have the heat dissipation as stand-alone power supplies. They seem to rely on the case fans to push air through them for cooling, and the little internal fan in the server power supplies doesn't have enough CFM to do the job.

Others have noted that the PSU's used on the A7/A9 can do the job, and as long as you don't overheat the PSU that's true. The server PSU's are cheaper also.

I like the idea of running a pair of 750W PSU's per miner though, since I can get 2 of those for less than a single LEPA G1600.

Well I have not ordered one yet. (even thou I'm babysitting some coming here to move along) That may change I'm weak willed. But anyway if I was gonna run these
I would run them like the Titans with the 2 prong psu adapter like the knc y adapter.



and 2 psu's of at least 860 watts (over kill I know but I likes them big )

so you would have 2 leads to each psu end.

Also nothing less then a psu with lowest of 16awg wire also IMHO

my 2c on this ...why jam it all up on 1 psu....seems silly with what folk have seen happen to psu's running 24/7 for months

Anyway if I was getting an A4 I'd do this. I'd also run it 220v thru this (saved my ass in storms 3x..wiped the SD cards so without them my Titans would likely be bricks now)

https://www.amazon.com/Tripp-Lite-International-Protector-EURO-4/dp/B00006HZ4M/ref=sr_1_1?ie=UTF8&qid=1468755216&sr=8-1&keywords=euro+tripp+lite

You can usually find them for 1/2 that price on eBay.

Check out my complete setup at (or most of it anyway in the basement some hosted) at lostgonzo.imgur.com

being paranoid that is how I'd do it overkill thou it may be

I hear ya on the red flags and all your points are valid. As others have noted, I guess it is how much risk individuals are willing to take. Seems like some are ok with the risk, hence the order of 76 or whatever that number is/was.

The PSU interested me. So say I have a 1000W PSU with 6 connectors. Can't I just chop a set of wires and make/loop another connector of it? I mean if the A4's take 1000W and I have a 1000W PSU, then it's just an issue of figuring out the wiring. This sounds a bit safer/easier than rigging 2 PSUs together?

If you check out the book "How To Import From China" by Richard Tong, page 84 it says:



That's a big red flag.

Now - I'm very curious.

The telephone number +86 18040500320 --- is a mobile phone number.

86 -- China country code, then an eleven digit number = cell phone. 

The prefix 180 = China Telecom

Please someone correct me if I am wrong -- but their company contact number seems to be a cell phone number through "China Telecom."

That doesn't look good.

The other number is a Canadian cell phone number - I think in Toronto.

Hmmm - interesting -- if you use the "Way Back Machine" to look at older versions of their website -- you will find a landline number listed on their site up until July 2014 -- when the number was taken off.  Then at some point the website was redesigned and the cell numbers were listed.

It is different for sure.  I wonder how much of this is due to the restrictions in China.  I know Chloe is saying she is blocked at this point from being able to login to BCT to post directly.  So maybe they intentionally did the domain registration outside, and are screening the company info to avoid getting caught by the "authorities"... Just thinking out loud here since I really don't know a lot about the inner workings of how the internet is managed in China or how much access they have outside. 

But is certainly does raise some questions.  If they didn't have a good track record here with a previous miner it would certainly be a red flag and not something a "new" company would be able to get away with.  Try giving Chloe a call and see if your able to get through to her.

Yes - but they elected to conceal their domain registrant information for innosilicon.com.  Does that concern anyone?  You have to pay extra to do that.

I see they have two domains -- one with the .cn (Asian based I guess) and then just then .com that goes to a an ip address in the US shared by 1000's of other sites.

Registrant Name: Contact Privacy Inc. Customer 0144618527
Registrant Organization: Contact Privacy Inc. Customer 0144618527
Registrant Street: 96 Mowat Ave
Registrant City: Toronto
Registrant State/Province: ON
Registrant Postal Code: M6K 3M1
Registrant Country: CA
Registrant Phone: +1.4165385457
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: [email protected]

This domain's privacy is protected by contactprivacy.com. To reach the domain contacts,
please go to http://www.contactprivacy.com and follow the instructions.