Weird Sli PhysX Bug

[Smoke2049]

Ok so first heres my setup , i7 3930k , msi big bang x power 2,16gb corsair dom plat 2133mhz ram
2 x evga GTX 680 SC Sig 2 in sli and an evga gtx 650 SC as physX , the system runs fine for the most part
however i tried disabling the physx card to see if i could get better benchmark scores without it and it crashes the benchmark and freezes the pc
if i restart and reactivate the physx card it runs fine , i have tried different drivers and with the physx card enabled it runs fine it only freaks out when i disable the physx card , any suggestions ? anyone had a similar experience?

 

[airdeano]

have you tried to run the test with the card removed (or disable that PCIe lane
so no to physically remove the GPU)? reboot and rerun test with PhysX disabled.

 

[Smoke2049]

i havent yet but i will try that

update/
ok heres an update it has now crashed with the physx card enabled , its saying the "Nvidia kernel mode has stopped working and has been recovered" then freeze

 

[SuB]

when making these kinds of changes you need to do a comlete refresh of your driver install.

Drivers installed when the cards are in sli mode don't necessarily work the same when sli has been disabled, I've been caught out by this in the past.

However you want to set it up, set it up that way. Then do a clean fresh install of the drivers and I bet the problem goes away.

By clean I mean uninstall EVERYTHING for the nvidia drivers, remove physx drivers etc etc.

Reboot

Reboot into safe mode, and use driver sweeper/cleaner to tidy up

reboot and install new drivers in custom mode, and only install the driver parts you need (don't install 3d stuff if you don't need/use it) and reboot again. I'm willing to be that will help.

 

[Smoke2049]

Ok , i have tested the cards seperately , one card was still slighly iffie the other was fine , i switched them around and they run fine , i cant get vantage to run past cpu test 2 , ive tried resinstalling it still no avail,but 3d mark 06 11 and 13 are running fine now, im thinking maybe one of my gtx 680s has something small wrong with it any thoughts?

 

[alienware]

Recently a friend of mine had a EVGA 560ti with a faulty Physx PPU. His card worked perfectly if Physx was disabled yet when he enabled it he got artefacts and glitches.

Can you run something like the Physx benchmark (forget what it's called now Google will help you out) fluidmark? and test the Physx PPU on each card separately.