SLI troubles

[Dwebtron]

So. Whenever I try to play a game with SLI enabled on my machine, the sound starts to stutter/sound robotic, the FPS drops very low, and the entire machine eventually crashes. One time, I got a blue-screen that said "machine_check_exception". Usually when playing a game, I have ventrillo running in the background, and my friends tell me that my voice sounds like the audio that I'm hearing... suttery and robotic.

I've noticed that this happens more frequently in some games than others, with symptoms varying for each game. For example, Starcraft 2 exhibits the above behavior almost immediately, while Arma 2 (DayZ) can run mostly flawlessly for a few hours before the FPS drops, with little consequence. Counterstrike: GO seems to be the median between these two games. I can usually get between 30-60 minutes of gameplay before this happens.



I've tried:

*overclocking my motherboard a little bit (I've never done that before... any suggestions on where to start?)
*New / Old drivers
*Forcing AA/AF on/off in Nvidia Driver
*Switching the cards around on the mobo's PCIE slots
*Using each card on it's own to ensure it's working

My specs:
*Cpu: i7-930 @ stock
*Mobo: Asus P6T http://www.asus.com/Motherboards/Intel_Socket_1366/P6T/
*Ram: Kingston HyperX 12GB DDR3 1600 PC3 12800 http://www.newegg.com/Product/Produc...82E16820104168 (forget @ what, but this happens at stock and what it's at now)
*Seasonic 850 watt PSU
*2x EVGA GTX 580 1.5GB @ stock speeds


So ah.... do you guys have any suggestions on what to try here? Thanks in advance for any ideas!

 

[denis280]

are all your drivers up to date.might wont to try the beta one.

 

[Dwebtron]

are all your drivers up to date.might wont to try the beta one.

...
I've tried:
*New / Old drivers
...

Not to be rude or anything...

 

[Dwebtron]

are all your drivers up to date.might wont to try the beta one.

I just tried the newest (stable) one from nvidia's website. it's from about a week ago, and still no change...

 

[Steltek]

I assume you've tried resetting your BIOS back to defaults to ensure something isn't set incorrectly from your past overclock attempts? Have you tried running a session of MEMTEST86+ separately on each of your memory sticks one at a time to ensure you don't have a bad memory module?

Finally, what BIOS are you running? Is it the most recent available for the P6T?

You might also want to consider swapping out your SLI bridge to ensure you don't have a bad one.