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PC light blue screen, random restarts

Hello, for the past two days my PC has been randomly restarting or freezing at inexplicable points in time. For example, it will freeze during sessions of gaming, watching videos on the internet or just go haywire during boot-up and restart itself. The freezes leave my PC with a solid black screen and a screen light blue, I don't BSoD, other times my screens go a static/pixelated like green/pink colour.

My PC was fine before 2 days ago, I had a friend around and I was helping him determine what was wrong with his PC as he had just ordered new parts and believed an item was DOA, in helping him I tried his case and RAM within my PC. Ever since then I have been stricken with this infuriating issue.

My specs are as follows:

- AMD FX-8350
- G.Skill Ripjaw 4*4GB 1333MHz RAM
- 2*EVGA Nvidia GTX 660's (Recent driver installation, from the website not Nvidia experience)
- SanDisk 64GB Solid State
- WD Caviar Blue 500GB
- AsRock 990FX Extreme3 Motherboard
- Corsair GS800 800W PSU
- Windows 7 Ultimate

All is stock, I don't even attempt to OC as I have little knowledge on OC'ing, the system is around 1 1/2 - 2 years old, I've already tested RAM by taking individual sticks out, I currently have 12GB of RAM in at the moment and the freezes are less frequent, I have also removed another 500GB HDD as I assumed it was bad sectors due to it being an old HDD I removed from a Sky HD box, but to no avail the problem still persists. I'm stumped. My temps are incredibly cool, even while max load. (Have stress tested with Prime95) and have attempted to use Memtest86+ I just don't know what to do... Please help me.
7 answers Last reply Best Answer
More about light blue screen random restarts
  1. just in case SSD dont like be without free Space.may help try different video drivers.


    P.S.also may help check Event Viewer for red error signs.
  2. Thank you for the swift reply, I'm currently scanning for bad sectors but as soon as that has finished I will try reverting to an earlier revision of the Nvidia drivers. Also I have checked Event Viewer and I'm unsure what I'm looking for, I have a fair few errors but a lot of them are as follows:

    Log Name: System
    Source: Microsoft-Windows-Kernel-Power
    Date: 12/10/2014 20:29:41
    Event ID: 41
    Task Category: (63)
    Level: Critical
    Keywords: (2)
    User: SYSTEM
    Computer: Psynen-PC
    Description:
    The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
  3. psynen said:
    Thank you for the swift reply, I'm currently scanning for bad sectors but as soon as that has finished I will try reverting to an earlier revision of the Nvidia drivers. Also I have checked Event Viewer and I'm unsure what I'm looking for, I have a fair few errors but a lot of them are as follows:

    Log Name: System
    Source: Microsoft-Windows-Kernel-Power
    Date: 12/10/2014 20:29:41
    Event ID: 41
    Task Category: (63)
    Level: Critical
    Keywords: (2)
    User: SYSTEM
    Computer: Psynen-PC
    Description:
    The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.


    ye that message usually come after computer restarts(right direction)there time stamps and error(s)before that should be.
  4. Best answer
    if you put his RAM in your computer, your BIOS will detect the change and it will reset the computers memroy timings. It will also rebuild the internal database that the BIOS later sends to windows.

    you would want to update your BIOS, or reset it to the defaults and reconfigure. It will force the BIOS system to rebuild its database and set the hardware voltages, timings and clock speed to correct values.

    you can also, just go into the BIOS and turn off a hardware function and re enable it. Most BIOS will then just rebuild its database.
    (better to go to defaults though, or update the BIOS because people never figure out many of the machines problems are caused by the BIOS bugs that have been fixed but not installed)
  5. Here's what I'm dealing with. I've put my other stick of RAM back in now so I have all 4 sticks of 4GB inserted, and I've found that when I run Windows Experience Index it crashes to the following screens. Johnbl, thank you for the reply, I'll give flashing my BIOS a shot in the morning.


  6. I have finished running memtest86+ for 8hours and no errors have surfaced. I'll try to flash my BIOS later and see if that resolves my problem.
  7. johnbl said:
    if you put his RAM in your computer, your BIOS will detect the change and it will reset the computers memroy timings. It will also rebuild the internal database that the BIOS later sends to windows.

    you would want to update your BIOS, or reset it to the defaults and reconfigure. It will force the BIOS system to rebuild its database and set the hardware voltages, timings and clock speed to correct values.

    you can also, just go into the BIOS and turn off a hardware function and re enable it. Most BIOS will then just rebuild its database.
    (better to go to defaults though, or update the BIOS because people never figure out many of the machines problems are caused by the BIOS bugs that have been fixed but not installed)


    Flashed my BIOS to the latest revision and it resolved my issue. Thank you so much.
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