Best motherboard for Pcie2.0 bandwidth?

I’m looking at buying a new motherboard as part of a test rig for an application which requires high device <-> host memory copy speeds, running dual GTX260s.

Currently i have an Inno3D 680i SLI, which for some reason runs one GPU on x16 and the other x8 (Pcie 1 ) , even though it should run both on x16.

Can anyone suggest a fix for this?

If not whats the best new board for the following kit:

Q6600 @ 3.1Ghz
4 Gb DDRII @ 850Mhz
2 x GTX260 @ 730 1480 1250
700 W PSU


EVGA has a 780i motherboard which uses DDR2 memory and has three PCIe 16 slots; two of these are 2.0 and one is 1.0. I have no personal experience with this board.


I am a big fan of the Foxconn Destroyer because of the onboard video, but that’s for an AMD processor.

Do you have to disable the onboard video in order to use a cuda card, because

it seems that display drivers that support cuda cards do not support onboard video?

No, you can use both. The MCP in the Destroyer is actually a CUDA device as well.

(for what it’s worth, the computer behind me has several Tesla C1060s for compute and is using the mGPU for display.)