4 7990 for coin mining?

[SatansHollow]

I just watched Linus's 7990 showcase. Could three or 4 of these be used for folding or mining?

 

I already know 4 gpus is the max for regular use but does the same thing apply for mining/folding? I have used a two 7970 setup and they seem independent but coding etc is way over my head

[Samdb]

The heat output would be tremendous, not to mention the power it would draw.

[Overl0rd]

You'd need a VERY good ventilated case for that indeed.

[Venomz1337]

Since when can you do more than 2 7990's?

[ProGearUk]

There is no point in coin mining to be honest. It is a bubble currency. Laws and taxes will be slapped on it soon and the final blow that will bring these crypto currencies to their knees is the fact that coins will just be too hard to mine for most people, this will get rid of the appeal of the currency.

[Levent]

You'd need a VERY good ventilated case for that indeed.

what case ? lol this system will need open air usage 

[YellowDragon]

Why is everyone still so dead set on GPU mining, its not cost efficient at all, if you want to mine i recommend picking up some ASICMiner Block Eruptors. They are little ASIC chips that run off of usb power and they kick the snot out of any GPU in terms of performance/watt.

 

One of these little guys runs you about $67 and nets you 330M/hash. 4 of them could trounce a 7990 for about $250 and you would have a total power draw around 10Watts compared to 375  watts with the 7990, also it would only take around $5 a year to keep them mining 24/7.

 

 

 

 

ASICs are the way of the future, this setup would be very upgradable as you would just need a large USB hub to keep plugging these things into. I actually run one myself with 4 of them linked to a Raspberry Pi, its dead silent and produces next to no heat.

 

Here is an example of this system, this one pulls 11.8 GH/s, far more then any GPU farm and only draws the power of a very low end GPU:

 

 

Here is a guide if you are interested:

http://learn.adafruit.com/piminer-raspberry-pi-bitcoin-miner/initial-setup-and-assembly

 

 

 

Here is a link to one:

http://www.ebay.com/itm/ASICMINER-Block-Erupter-USB-Bitcoin-ASIC-Miner-NOT-BFL-or-AVALON-In-Hand-/171098801276?pt=LH_DefaultDomain_0&hash=item27d648847c

[YellowDragon]

There is no point in coin mining to be honest. It is a bubble currency. Laws and taxes will be slapped on it soon and the final blow that will bring these crypto currencies to their knees is the fact that coins will just be too hard to mine for most people, this will get rid of the appeal of the currency.

Not really, one thing cant be taken away and that is ease of use, which is a bigger factor, as for mining well this isn't for grandma and grandpa, most people are too scared to even touch a computer let alone setup miners and configuring them.

[Venomz1337]

Am I still the only one reading this correctly where he's asking about '4' 7990's?

[Power]

Am I still the only one reading this correctly where he's asking about '4' 7990's?

Since when can you do more than 2 7990's?

 

Mining doesn't require crossfire as far as I know

[FloRolf]

If you can afford 4 7990 you can afford a small custom loop to cool them. Then you wont have any problems ^^

[ProGearUk]

Not really, one thing cant be taken away and that is ease of use, which is a bigger factor, as for mining well this isn't for grandma and grandpa, most people are too scared to even touch a computer let alone setup miners and configuring them.

the law will come and the taxes.

[Venomz1337]

 

 

Mining doesn't require crossfire as far as I know

 

 

But technically they won't work?

[YellowDragon]

the law will come and the taxes.

well yes *rolls eyes*, Bitcoin is already declared an Official Currency by the US government. The idea behind bitcoin is that is an easily subdivinded currency with no central bank/source. This will always ring true, the government can tax it, but they cannot control production of it. That is they key as they cant simple "print more bitcoins" like the US dollar.

[Flamewalker]

But technically they won't work?

I think they all work for folding, anything other then that it won't work since crossfire is limited to 2

[ProGearUk]

well yes *rolls eyes*, Bitcoin is already declared an Official Currency by the US government. The idea behind bitcoin is that is an easily subdivinded currency with no central bank/source. This will always ring true, the government can tax it, but they cannot control production of it. That is they key as they cant simple "print more bitcoins" like the US dollar.

it is not worth it for gpu miners anymore.

[YellowDragon]

it is not worth it for gpu miners anymore.

 Thats why I mentioned the Block Eruptors, Mining on GPUs is not worth it. The OP wanted to buy hardware just for bitmining, to do that with GPUs would be foolish and costly

 

I also have a post just on the Block Eruptors:

http://linustechtips.com/main/topic/44678-kill-your-gpu-bitcoin-mining-with-block-eruptors/

[Anubikai]

the us government cant control it.....its not theirs to control......bitcoins are all over the world......no country will be able to tax it or control it.....unless the world government makes a set of reglated standard rules that all contries follow to regulate the currency it cant happen.....a judge somewhere has only recently declared ti a currency......also the governments isnt making the bitcoins, users are.....if everyone started printing dollar bills they would have no control over USD....

 

also do what yellow dragon suggested with those usb things.....better and cheaper for your purposes....

 

-Anubikai

[Youbetternot]

What is coin mining?

[RuecanOnRails]

Hey guys, can you not get off topic and stop posting FUD about Bitcoin and other cryptocurrencies, Tthank you. The OP is asking a legitimate question in regards to running quad 7990 in a mining rig.

 

 

First, You cannot run that many gpu's each card counts as two and I'm pretty sure there is a hard limit of 7 GPU's that can work on one board for mining. If you wanted to get 4 7990's you would need 2 mining rigs. Place 2 cards in each, then you can add 3 more single cards, Or 3 7990's in one rig. However you want to divide them so you can get 7 cards per rig.

 

Second, the 7990's run the GHZ bios which doesn't mine very well at all. You will likely see an average of about 585 K/hash per gpu core 1170 khash per 7990 when mining scrypt (you don't mine SHA-256 with gpu's at this point)

 

Third, If you were to get individual 7970's they are easier to manage, and get to a higher hash rate. A 7970 can get 725 - 750 Khash each card. They are also cheaper.

 

Fourth, Build the mining rig in a milk crate or some other open air container using PCI extenders to separate the GPU's for better air flow.

 

 

Hope this helps answer your initial question.

[SatansHollow]

Hey guys, can you not get off topic and stop posting FUD about Bitcoin and other cryptocurrencies, Tthank you. The OP is asking a legitimate question in regards to running quad 7990 in a mining rig.

 

 

First, You cannot run that many gpu's each card counts as two and I'm pretty sure there is a hard limit of 7 GPU's that can work on one board for mining. If you wanted to get 4 7990's you would need 2 mining rigs. Place 2 cards in each, then you can add 3 more single cards, Or 3 7990's in one rig. However you want to divide them so you can get 7 cards per rig.

 

Second, the 7990's run the GHZ bios which doesn't mine very well at all. You will likely see an average of about 585 K/hash per gpu core 1170 khash per 7990 when mining scrypt (you don't mine SHA-256 with gpu's at this point)

 

Third, If you were to get individual 7970's they are easier to manage, and get to a higher hash rate. A 7970 can get 725 - 750 Khash each card. They are also cheaper.

 

Fourth, Build the mining rig in a milk crate or some other open air container using PCI extenders to separate the GPU's for better air flow.

 

 

Hope this helps answer your initial question.

 

Thank you