8 month old build suddenly starts randomly restarting?

My build has suddenly started restarting every so often. I can't seem to pinpoint when it restarts, sometimes when I'm gaming, others when I'm just browsing the internet, seemingly random. I have no clue what to do after a quick google, here's some information I've came up with.

My 4 core temperatures are around 45-50, with a max of 52.
Event manager says it's a Event ID 6008 error, here's the full details -


Log Name: System
Source: EventLog
Date: 19/02/2013 13:59:54
Event ID: 6008
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: George-PC
Description:
The previous system shutdown at 13:58:29 on ‎19/‎02/‎2013 was unexpected.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="EventLog" />
<EventID Qualifiers="32768">6008</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2013-02-19T13:59:54.000000000Z" />
<EventRecordID>160179</EventRecordID>
<Channel>System</Channel>
<Computer>George-PC</Computer>
<Security />
</System>
<EventData>
<Data>13:58:29</Data>
<Data>‎19/‎02/‎2013</Data>
<Data>
</Data>
<Data>
</Data>
<Data>249</Data>
<Data>
</Data>
<Data>
</Data>
<Binary>DD070200020013000D003A001D004D03DD070200020013000D003A001D004D03600900003C000000010000006009000000000000B00400000100000000000000</Binary>
</EventData>
</Event>


My specs -

Intel Core i5 2400 Sandy bridge
Radeon 6850
Corsair 600W CX Builder Series 80 Plus Bronze PSU
MSI H61M-E33-B3 H61 1155 Socket 8 Channel HD Audio mATX Motherboard
Seagate 500GB Barracuda Spinpoint F3 Hard Drive - 3.5" SATA-II - 7200RPM 16MB Cache - HD502HJ
9 answers Last reply
More about month build suddenly starts randomly restarting
  1. How hot is the gpu getting?
  2. Your error indicates that "Event ID 6008 entries indicate that there was an unexpected shutdown"

    This unexpected shut down could have corruperd your HDD, Specifically a file(s) that are need ie a driver.

    Shut down could be multiple cause such as:
    ..Temperatures, But CPU looks OK, also GPU = ?
    PSU - Look at the +5 and +12 V rails, both at Idle and under load. I use HWMonitor fo looking at voltages If +12 is way out in leftfield, software is not correcly reporting it try a diff program.
    ..I use Prime 95 to check both +12 V rail and stability of system (+12 Should not be below 11.6 and the chang from Idle to load shoud not be > 0.3V
    ..Mmory errors - prime 95 will check memory and cpu for errors.

    To check GPU, I use Furmark.

    Added: If a File was corrupted, may need to re-install windows.

    NOTE: when using prime 95, inaddition to monitoring your +12V, monitor CPU temps!!. For Furmark, monitor +12 V and GPU temps.
  3. GPU is around 50, so that should be fine. I also ran memtest86 and that came back clean.
    The +12 V rail is around 8V, and the +5 V rail is at 5.2V, guessing the 12v rail may be the problem.
  4. 8v? Surely that is incorrect. Do you have a multimeter?
  5. That's what it says, nope I don't have a multimeter.
  6. 8 Volts is NOT a valid value! - Computer would not work.
    Spec for +12 V is 11.4 V. Much below this and it will not turn on.
    For what it's worth, your +5 is very close to the max; +5 is 4.75V -> 5.25 V.

    A multimeter is a very cheap investment, and VERY easy to use.
    Cost <$20
    simply plug the Black meter lead into one of the center sockets on a Molex pwr connector, Plug the red meter lead into either end. Set meter to read VDC - turn on Computer.
    If red Meter lead is pluged into the molex socket with red wire - THAT is your +5 V. Other end (orange or Yellow) would be the +12 V rail.
  7. Thank you very much for the help. If it is the voltages being too high, what can I do to fix this?
  8. Voltages are not really too high. The 12v reads WAY too low but that has to be an error.
  9. If you check with a voltmeter (as I indicated) and you fnd the +12V or +5V out of specs - The fix is very simple:
    YOU REPLACE the PSU
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