4 x HD7990s? Is it possible

[ravneillal]

I am planning to build a bitcoin/litecoin miner.
Do you think is it possible to have 4 (Physical cards) HD7990s on one board i.e Maximus V Extreme using a 3770k?

I know that max gpu's on a board is 4way sli or crossfire but i just wanna know if it is even possible to have 8gpu's on a single board?
 

[Jozi]

Nvm need to read more. :)

[xAdam]

This is counted as four way crossfire, since there are basically four GPUs there. What youre talking is eight way crossfire, Ive not seen a board that can do that o.O If there is it wont work with ivy or sandy bridge, since they only support four way crossfire

 

 

EDIT: they dont run SLI .. DUHH -.- feel like a noob.. they run crossfire-x theyre radeon.. <_<

[xToFxREAPER]

I am planning to build a bitcoin/litecoin miner.

Do you think is it possible to have 4 (Physical cards) HD7990s on one board i.e Maximus V Extreme using a 3770k?

I know that max gpu's on a board is 4way sli or crossfire but i just wanna know if it is even possible to have 8gpu's on a single board?

 

i believe it is possible but you have to get a specialized system to do it

[xToFxREAPER]

This is counted as four way SLI, since there are basically four GPUs there. What youre talking is eight way SLI, Ive not seen a board that can do that o.O If there is it wont work with ivy or sandy bridge, since they only support four way SLI

what hes talking about isnt sli or xfire, its basically having the cards on the board each running on their to use for the processing power in bitcoin, ive seen systems do it for high end computing and read about one made for brute force hacking so i know its possible

[AK0490]

When mining you don't even need the crossfire bridges, it should work fine. You will also need one hell of a power supply.

[rashdanml]

Don't know of any motherboard with 5-way SLI, let alone 8-way. Also, power requirements may be upwards of 1500-2000W, dangerously close to maxing out, if not exceeding, a single house circuit (1650W).

 

e: Removed not so relevant bits.

[xAdam]

Figured out a way, what about dual Xenon's on a server grade board? each running two 7990s with a sh** ton of RAM?

[ravneillal]

When mining you don't even need the crossfire bridges, it should work fine. You will also need one hell of a power supply.

 

 

Don't know of any motherboard with 5-way SLI, let alone 8-way. Also, power requirements may be upwards of 1500-2000W, dangerously close to maxing out, if not exceeding, a single house circuit (1650W).

 

e: Removed not so relevant bits.

So technically it is possible. And as for the psu i think a dual 1200watt should be enough, as for the house circuit hea in Fiji Islands we are using 240V line and i have a dedicated breaker which is 16amps running in my room, so  for the alleged setup it would be enough to handle the load.

[Wats]

You don't use Xfire bridges when mining so that's easy.

 

You can put seven 7990s on a board, they only need a tiny amount of bandwidth for BTC.

 

You should look into a real mining farm with that four 7990 monies.

[rashdanml]

So technically it is possible. And as for the psu i think a dual 1200watt should be enough, as for the house circuit hea in Fiji Islands we are using 240V line and i have a dedicated breaker which is 16amps running in my room, so  for the alleged setup it would be enough to handle the load.

Right, different places have different voltage lines. It's about 110-120V in most places in North America. Would also depend on the circuit breaker. Would also need to factor in limits due to continuous loads (which can be about as low as 80% of the circuit breaker max current).

[Legion]

Just use that money for an ASIC miner

[ravneillal]

Right, different places have different voltage lines. It's about 110-120V in most places in North America. Would also depend on the circuit breaker. Would also need to factor in limits due to continuous loads (which can be about as low as 80% of the circuit breaker max current).

I can upgrade the line to my room to 20amps or run another 16amp line. 

[ravneillal]

Just use that money for an ASIC miner

I have my doubts on ASCI miners.

Not really sure if i wanna go down that path.

Edited June 3, 2013 by ravneillal

[felixbearpig]

yeah if you can fid a big enough motherboard

[Legion]

I have my doubts on ASCI miners.

Not really sure if i wanna go down that path.

 

Well specialised rigs are going to be the future, those 7990's are probably going to end up burning through your wallet in terms of power consumption when the ASIC's arrive.

[ravneillal]

yeah if you can fid a big enough motherboard

 

Maximus V Extreme and liquid cooling the cards. That would fit easily on that mobo. 

Well specialised rigs are going to be the future, those 7990's are probably going to end up burning through your wallet in terms of power consumption when the ASIC's arrive.

I will have to do more research on asci miners if i were to consider buying them.

[FluffyNuggets]

Here's the question, are you going to get the $4,000 back from doing this? And that's just the cost of cards. The cost of other components and electric bill just doesn't seem worth it unless you're getting a lot of money out of it.

[ravneillal]

Here's the question, are you going to get the $4,000 back from doing this? And that's just the cost of cards. The cost of other components and electric bill just doesn't seem worth it unless you're getting a lot of money out of it.

I just did some reading on asci miners and the hash rates it does. I think i would be better off investing in a asci miner rather than building a ridiculously expensive system that would probably just do around 5GH/s as opposed to a 50GH/s asci miner.  So i would be spending half as less and getting 10 times the performance out of a asci miner. Thanks mate. Much appreciate your advice and other users input.

Linus Tech Tips forum is the BEST!

Edited June 3, 2013 by ravneillal

[FluffyNuggets]

I just did some reading on asci miners and the hash rates it does. I think i would be better off investing in a asci miner rather than building a ridiculously expensive system that would probably just do around 5GH/s as opposed to a 50GH/s asci miner.

I'd be lying if I told you I knew anything about this mining stuff lol. If you can make enough money to cover all this by mining then I say do whatever nets you the most money the quickest. Other then that this is way out of my knowledge :p

[delet my acc pls]

The maximum number of gpus for both nvidia and amd is 4 and one 7990 is 2 gpus so the maximum is 2 of them

[FluffyNuggets]

The maximum number of gpus for both nvidia and amd is 4 and one 7990 is 2 gpus so the maximum is 2 of them

He was talking about using them to render which is possible. 

[jllerk]

https://forums.butterflylabs.com/hardware-discussion/4237-where-we-now.html

 

https://hashcat.net/forum/thread-2587-post-16177.html#pid16177

 

FYI