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5+ GPU Support

post #1 of 5
Thread Starter 
Hi,

I could only find outdated (GTX 295 Era) discussions on this, so I thought I would try getting more recent information if anyone here knows.

I read somewhere that Windows cannot support more than four AMD GPU's, period. In the same place, I read that Windows cannot support more than 8 NVidia GPU's total (meaning you had to disable onboard graphics if you had them, if you were running four dual-GPU cards).

Other people were maintaining that you can run as many GPU's as you can fit on the motherboard. I am especially skeptical of the notion that five AMD GPU's will not work, but the blanket maximum of eight sounds more reasonable.

Regardless of what my intuition is telling me, I already have conflicting information. Can anyone clear this up?
post #2 of 5
You can run no more than 4 cards in Crossfire or SLI, but you can run as many individual GPUs as you want. If you could fit 8 GPUs onto the same motherboard, you could run all of them at the same time, they just would not increase performance. You would only want to run more than 4 GPUs if you have tasks that can use them all, such as folding, or mining. Hope this cleared it up for you,
post #3 of 5
Quote:
Originally Posted by thepoopscooper View Post

You can run no more than 4 cards in Crossfire or SLI, but you can run as many individual GPUs as you want. If you could fit 8 GPUs onto the same motherboard, you could run all of them at the same time, they just would not increase performance. You would only want to run more than 4 GPUs if you have tasks that can use them all, such as folding, or mining. Hope this cleared it up for you,

Yup. We used to run something like 5 or 6 GPUs for mining for awhile, until we decided we weren't making enough return to continue lol.
post #4 of 5
Thread Starter 
Aight, thanks.

Of course I knew about SLI / CFX but this is definitely about a compute application.

I had been thinking of using the integrated GPU to actually use, monitor, maintain, etc, the system, but depending on whether I go up to 8 or just 6 might affect that. Do you know if there's any truth to the 8-GPU maximum?

Thanks again
post #5 of 5
Quote:
Originally Posted by YawMawn View Post

Aight, thanks.

Of course I knew about SLI / CFX but this is definitely about a compute application.

I had been thinking of using the integrated GPU to actually use, monitor, maintain, etc, the system, but depending on whether I go up to 8 or just 6 might affect that. Do you know if there's any truth to the 8-GPU maximum?

Thanks again
I think it depends on the operating system. I am not sure how many GPU cores Windows supports.
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