Multi-GPU Doesn't work!!!! HELP!!!! (GTX 570 + GTS 250)

[trudogolik15rus]

When I include 2 GPU FRS decreases! What to do? After all should be on the contrary! It turns out that one GTX 570 counts faster than GTX 570+GTS 250!!! Or I what not so do?

Here that I particularly did, version CUDA 3.0 : http://www.youtube.com/watch?v=d-2rSeErpj4

[abstrax]

When I include 2 GPU FRS decreases! What to do? After all should be on the contrary! It turns out that one GTX 570 counts faster than GTX 570+GTS 250!!! Or I what not so do?

Here that I particularly did, version CUDA 3.0 : http://www.youtube.com/watch?v=d-2rSeErpj4

Yes, that's expected. With the current way how multi-GPU works, you currently you should not mix devices with extremely different performances. Your GTS 250 is slowing down the total performance. But don't worry too much, because the GTS 250 is estimatedly 6-7x slower than the GTX 570. I.e. you wouldn't gain much, even if multi-GPU would scale completely linearly.

It's better to use the GTS 250 as display card and the GTX 570 for rendering.

Cheers,
Marcus

[steveps3]

I'm not sure if this will work, see my other post because I am having a problem using a lesser card as the screen driver.

http://www.refractivesoftware.com/forum ... =33&t=6512