Hello, I have run into a problem yesterday since I have installed an EVGA GTX 550 Ti into my system. Most games I have run since installing this card have started freezing, before freezing my entire system and most of the time forcing me to restart. I have managed to get Terraria to work though. I'm running driver 331.40 as of now, I've tried 306.94 and 327.23 with no change to the problem.

Here are a list of my specs.


Motherboard: M4A785-M Asus

GPU: EVGA GTX 550 Ti

CPU: AMD Phenom X4 9850

______________________________________________________________________________
Also, I have a 750 watt power supply, so I believe power should not be an issue.
I've also found that the Nvidia drivers installed sound drivers I recall, and I disabled them in the device manager as a warning showed up next to them.

Before I installed this card, I was running an ATI card. I did have another Nvidia card and it had most of the same problems I am facing now.
__________________________________________________________________________
Temperature seems to not be an issue either, I have an average temperature of 34 C for my GPU, my CPU isn't much higher either.

Hi, thank you, I did as said, the problem still persists. I originally installed the ATI drivers through the program menu and afterwards Driver Sweeper.
I've noticed that Company of Heroes worked on low settings, but when I turned the settings to high, the game began to have the same problem as most of my other games.

Ramtruck
I had this problem with the same graphics card and rolled back from a beta driver. I also chose to quit using beta drivers and I am currently on driver 320.49 with no problems. 

How did you remove your old drivers?

Ramtruck
I didn't. The installer you can get from here, at least, does: 
You just run it and check the things you want and everything gets replaced.
I can't post links yet, actually. Just google "nvidia driver downloads" and it should be the first result

Still having the same problems.

I only have one PCI-E 16x slot on my mobo, and the ATI card worked on it..so..

Bad typo on the post regarding the ATI drivers. I meant to type uninstall and accidentally typed install, I'm sure all of the ATI drivers are uninstalled and gone.

Bump, anyone know what is wrong, and I'm very sure the power supply is not a problem. If this helps any, I have a Creative sound card.
 
UPDATE: I've changed the number of cores one of my games used (to one) and the game didn't crash, it was also in windowed mode. However, this isn't a fix. As not all games are fixed by this.