Windows 7: BSOD playing games, 0x50, 0xA, 0xD1

My graphics card fried about a month and a half ago and I replaced it with a Nvidia GeForce GT 640, since then I have been getting blue screens whenever I play games. I did uninstall my old graphics drivers and installed the new ones for my new graphics card. Usually I will get at least a couple minutes of play time before a crash, sometimes a couple hours, it's never very consistent on how long it will take to crash. I've ran a memtest86, and a chkdsk (although possibly only on the OS and nothing else, I'm extremely new to this and relatively unsure what I'm doing).

Video Card - Stress Test with Furmark

Run it, let us know the results.

I ran the test for 16 minutes, it was about 6400 frames total. It maxed out at 53 C, although it only got 7 fps, which to me seemed a little low but I don't know if that matters. Also it held up fine, no artifacts or distortions.

You may follow two more things .....
http://windows.microsoft.com/en-US/w...agnostic-Tool; and

Uninstall and reinstall the display driver.

• Download and install Driver Fusion.
• Reboot the computer in Advanced Boot Options, safe mode. Search Driver Fusion in your start menu, and remove all components of your nVidia display driver.
• Boot normally now. Go to Drivers - Download NVIDIA Drivers, follow option two to search for the appropriate driver for your system automatically, and install it.

Alright so I ran the DirectX diagnostic tool and when I ran the 64 bit DxDiag I had this in the notes section of a couple of the sound tabs, is this something I need to find and update?

"The file WsAudio_DeviceS(1).sys is not digitally signed, which means that it has not been tested by Microsoft's Windows Hardware Quality Labs (WHQL). You may be able to get a WHQL logo'd driver from the hardware manufacturer."

Also when I used the Driver Fusion I saw AMD Display drivers and was wondering if those might be something left over from my first graphics card that I possibly didn't delete? My first graphics card was an ATI Radeon, or something like that, I don't really know that much about it.

Do all that is suggested by DxDiag tool.

And, if there is any leftover of AMD Display driver, uninstall it using |MG| Driver Fusion (Driver Sweeper) 1.2.0 Download.

Well I couldn't find drivers to replace the ones the DxDiag tool said weren't WHQL signed, but all the AMD drivers should finally be gone. On the positive side though I didn't have a single BSOD today which hasn't happened since I installed the new card.

Good news.

Now observe the computer. If it crashes again, let us know.

Well I was free of BSODs for a couple days, but I got 2 of them in the last hour or two, here are the dump files.

Dont worry, I also have dine what I am suggesting you now.

Uninstall the October version of nVidia display driver using driver fusion, and then install the earlier one, which was stable there.