superwabbit

I first tried the Nvidia recommended setting with no luck. Neither do the two Alternate Rendering modes work. The problem I'm having isn't just low performance, its extreme graphical errors as soon as the main menu screen appears. Its so bad I am unable to use the main menu at all.

Uninstalled drivers. Unfortunately Guru3D's driver cleaner is no longer available. Rebooted system and search for any remnants of nvidia drivers (didn't find any). Rebooted one more time for good measure. Install 266.58, and booted ArmAII OA. Still getting the same problems. So.... I started from the top of the 3D properties in the Nvidia Control panel and changed one thing at a time. If changing a setting had no discernible affect I restored the settings to default. Finally got to the Multi-GPU Rendering Mode. I assume this is SLI. I set it to Single GPU and everything worked fine. Was kinda surprised how smoothly it was running so I ran EVGA's Precision to verify only one core was being used, and it was. So, I remember reading somewhere about a hack or trick to get SLI working. If I recall it had to do with a previous version of the game. Anyone have an idea to get both of my GPU's back in the game?

Will do. I plan on using Guru's driver sweeper tonight.

Thanks for the suggestion Ziggy. I feel like these days one should not have to reboot after uninstalling a graphics driver nor should we have to run a driver cleaner. But you may be right and the install isn't clean so I'll give that a try and install 266.58. The think I don't get is why does the OA demo run without problems?

Arma2 OA Demo ran very well for me. Purchased the game and I get graphic errors as soon as the main menu is loaded. Looks like it is overheating but using the EVGA Precision software I see that it is not and temps are below 80 (which is below most of my games). The graphic errors are so bad I am unable to make it to the Video Setting from the main menu. After a few minutes of this the system either freezes or crashes. Took out the air can and the interior is now clean but still having problems. Why does the demo work but the full game does not? I have tried a full uninstall re-install of graphic drivers and the game with no affect. After spending the past three nights reading forums my mind is numb. Most of the help threads are too long to read all the way through and even google isn't helping much. Any advice is appreciated. Specs: Purchased and downloaded the full game via Steam. Windows 7 Ultimate 64 GTX 295 running 270.61. Also tried 275.33 drivers and had the same issues so I reverted to 270.61 Intel core i5 2500