Refer to post #25
Tests 2 and 3 basically confirm the known fact that ''when each card is stressed individually, no problem occurs''.
Test 1 does give new hint: even without SLI, both cards cannot be stressed simultaneously. So, SLI (software wise(driver) and hardware wise (the bridge)) should have little to do with this crashing.
Further to my post #26
, I made a mistake as I thought yours are GTX470 SLI (vs GTX480s). I apologize.
Now, I suggest:-
Corsair states (in the Owner Manual) that they do not recommend mixing native and modular PCIe cables to the same graphic card. They recommend: the 2 native PCIe cables (ie 12V2 + 12V2) to GPU1 and then 2 modular PCIe cables (ie 12V1 + 12V1) to GPU2.
See pic 1 below for an example of connecting two GTX480s.
So, try this configuration for improved stability.
Now, do Mafia II test (GPU1 as graphic rendering and GPU2 as Physx)
Redo Mafia II test (GPU1 as Physx and GPU2 as graphic rendering)
Redo the 2 tests above after switching 12V2+12V2 to GPU2 and 12V1+12V1 to GPU1