Random freeze/crash/stutter/BSOD

[swalrus]

Hi, I've been having some trouble with my computer lately. It crashes/freezes randomly. The screen is frozen for a couple of minutes and the sound hangs/loops. Mouse and keyboard stops responding, then the screen turns black. Sometimes I get a BSOD, sometimes the screen remains black. This usually happens when the computer has been on for a long time, or if I have a lot of programs running or playing some games (happened twice in PlanetSide 2, once in Battlefield: Bad Company 2, a couple of times in Garry's Mod...). When this happens I have to restart the computer by pressing the power button.

I have set the computer to create minidumps.
Automatically restart is unchecked.
Write debugging information is set to "Small memory dump (256 KB)"
And Small dump directory is set to "%SystemRoot%\Minidump"
But it still doesn't create minidumps. I have checked inside the Windows directory and there is no minidump folder and no .dmp file.

I checked the Event Viewer and found that when my computer is crashing it creates an error with the Event ID 6008 and one with Event ID 1101. And sometimes a warning with the Event ID 219.

Details on 6008:

Spoiler

EventData

21:10:40
‎2012-‎12-‎05


12860


DC070C000300050015000A0028001401DC070C000300050014000A0028001401600900003C000000010000006009000000000000B00400000100000004090000


--------------------------------------------------------------------------------

Binary data:


In Words

0000: 000C07DC 00050003 000A0015 01140028
0008: 000C07DC 00050003 000A0014 01140028
0010: 00000960 0000003C 00000001 00000960
0018: 00000000 000004B0 00000001 00000904


In Bytes

0000: DC 07 0C 00 03 00 05 00 Ü.......
0008: 15 00 0A 00 28 00 14 01 ....(...
0010: DC 07 0C 00 03 00 05 00 Ü.......
0018: 14 00 0A 00 28 00 14 01 ....(...
0020: 60 09 00 00 3C 00 00 00 `...<...
0028: 01 00 00 00 60 09 00 00 ....`...
0030: 00 00 00 00 B0 04 00 00 ....°...
0038: 01 00 00 00 04 09 00 00 ........

Details on 1101:

Spoiler

UserData

- AuditEventsDropped

Reason 0

Details on 219:

Spoiler

- EventData

DriverNameLength 124
DriverName WpdBusEnumRoot\UMB\2&37c186b&0&STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_GENERIC-&PROD_COMPACT_FLASH&REV_1.00#20060413092100000&0#
Status 3221226341
FailureNameLength 14
FailureName \Driver\WUDFRd
Version 0

I ran memtest86 for 8 passes. No errors.
I ran checkdisk. No errors.
I have updated all drivers. Uninstalled and reinstalled display drivers. I even did a clean install of Windows 7.
My temperatures are fine. Everything is <40 degrees celcius.

My computer is an Acer Aspire AM3920. I've had it for 16 months. I replaced the graphics card and the PSU with better ones, but that's 5 months ago. Everything else is stock.
I've never had any trouble with it until now.
I'm running Windows 7 Home Premium SP1 64-bit

PC specs:
CPU: Intel Core i3 2100 @ 3.1Ghz
Motherboard: (No specific brand, I guess. Acer Aspier AM3920 according to CPU-Z)
PSU: Corsair GX600 @ 600W
Graphics: Sapphire Radeon HD 6870 1GB
RAM: 6GB DDR3 (3x Samsung M378B5773CH0-CH9 2GB DDR3 1333MHz)
HDD: (Don't know, but it's 1 TB)

Does anyone know what's causing it to freeze/crash/stutter/BSOD? Is it bad RAM, bad PSU or is it something else?

 

[house70]

Could be hardware failure (I am thinking the graphics card). To check, replace the card and see if any more crashes. I had similar issues, as well, and it turned out the graphic card needed replacing.
Before that, run some graphic-intensive benchmarks (3dMark, for instance) and see what happens.

 

[swalrus]

Alright, I'll try that. Thanks for the answer.

EDIT:
I ran 3dMark and Unigine Heaven and it didn't crash.

EDIT 2:
I just got a BSOD again. This time was just browsing the internet. The whole Windows process just died. The task bar disappeared. Everything else worked fine, until I tried to Ctrl+Alt+Del. Then the screen went black, and then the monitor lost signal to my computer, and then a BSOD appeared on my screen.