Random reboots

[Robntech]

Last October I built a custom computer:

• Antec Sonata case w/ 500 watt PSU (Eath watts PSU)
• Intel DP55WG board
• Intel i5 quad core CPU
• Stock Intel CPU fan and thermal gel
• Crucial DDR3 memory (2GBx2)
• WD 500GB HDD
• Saphire ATI Radeon 4650HD PCI express video card (does not require additional power)
• Onboard audio andLAN
• Windows 7 x64

Randomly while using the computer it will reboot a if I hit the restart button. This will happen randomly when I watch a video (flash) for 30 minutes or listen to Zune for 20-30 minutes (although Zune ran for 8 hours all day yesterday with no problems) I can play Star Trek Online for about 20 minutes until it reboots. This has happen while editing photos as well in the Canon software.

I thought that it was blue screening however I don't see the blue screen so I set Windows to NOT reboot when a BSOD occurs however it still reboots which makes me feel a BSOD is not happening.

I ran memtest and it passed. I don't know if it's over heating or not or if this would even cause this to happen. I am not over clocking. I also have had this up and running for 2 days straight with no problems, I shut it off last night, turn it on this morning and in 10 minutes it reboots.

The Event log only has this entry when this occurs:

Level: Critical
Date/Time:
Source: Kernel-Power
Event ID 41
Task Category: (63)
Message: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.


Level: Error
Date/Time:
Source: EventLog
Event ID 6008
Task Category: None
Message: The previous system shutdown at 5:20:18 PM on ‎xx was unexpected.

Any suggestions ill be very helpful, thank you.

 

[Robntech]

Anyone?

 

[SpanishFry]

i've been researching this for about a week now. i'm still having the issues but I think mine began when I added a 2nd HDD to my shuttle sff.

step 1: turn off intel speed step in your bios

 

[hiddensniper11]

Does it reboot if you run something light on your PC? Microsoft Word maybe?

 

[chef-]

My guess... power supply.

Try removing things so diagnose. IE:Second harddrive, dvd drive

Try a different outlet in your wall... also dont plug too many things into one outlet

Hope this helped!

 

[AnonymouseUser]

I ran memtest and it passed.

How many passes? One or two is not enough, let it loop overnight.

Disable onboard audio and LAN and run some graphics/gaming benchmarks.

Check that you have all the latest drivers installed.