BSOD's, Freezes, Screeching Speaker Noise, etc, etc

Run Prime95; all 3 tests would be a good idea (Small and Large FFTs, Blend).

https://www.sevenforums.com/tutorials...t-prime95.html

Also, run Memtest86 overnight: RAM - Test with Memtest86+

...Summary of the dumps:

Code:

Built by: 7600.16617.amd64fre.win7_gdr.100618-1621
Debug session time: Fri Jan 21 04:35:51.181 2011 (UTC - 5:00)
System Uptime: 0 days 0:08:06.492
Probably caused by : ntkrnlmp.exe ( nt! ?? ::FNODOBFM::`string'+ffd9 )
DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT
BUGCHECK_STR:  0xA
PROCESS_NAME:  Steam.exe
FAILURE_BUCKET_ID:  X64_0xA_nt!_??_::FNODOBFM::_string_+ffd9
SystemProductName = System Product Name
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
  

Hardware is the most likely cause.

Did you run all 3 Prime95 tests? Be sure to run each of them for about 3 hours.

Also, do you have a different PSU you can test out? Could you move the PC to a different circuit in the house, to try to eliminate power issues?