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Random reboots while idle

Computer Help - AnandTech Forums - forums.anandtech.com
Hi everyone. I've been having a problem recently with my computer, and I am starting to chase my tail around.

Recently, my computer has started rebooting randomly. This never occurs while I am using the system, but when I sit down after my workday or after waking up, I'm greeted by the Windows login screen. Event 41: Kernel-Power shows up in the event viewer, with the first one occurring on March 13. There isn't another Event 41 until April 14th, and after that the frequency increases to where it has restarted at least once a day since April 28th.

Here are my specs:

Gigabyte GA-P55-UD4P

Intel Core i5 750 (stock cooler)

12GB G.Skill 1600 MHz RAM

Thermaltake Toughpower XT 750W

XFX Radeon 7850 Double Dissipation, Catalyst version 13.4 (installed April 25th, 2013)

Samsung 840 120 GB (installed March ~8th, 2013)

2 more Western Digital hard drives

Windows 7, fully updated

I'm suspicious of my recent hardware alterations, since the SSD and GPU are both pretty new. The GPU installation does coincide with the rapid increase in reboots, but they were occurring prior to its addition. Part of the reason for the rapid increase is because I originally had Windows set to sleep after 30 minutes; I disabled sleep after installing the GPU so I could download a Steam game overnight. Is there any possibility of the SSD being the root cause? I did reinstall Windows on the SSD after installing it, so the OS copy is relatively fresh.

I ran memtest86+ overnight and did not encounter any errors. Likewise, I have checked my PSU voltages with a multimeter and did not see any anomalous values. I also tried running a PSU and CPU stress test with OCCT but it halted after 90 seconds due to the CPU overheating at 86 degrees C. I'm looking into replacing the heatsink and fan, but to be honest, I have not encountered any adverse effects while gaming, much less while the system is idling. OCCT shows temperatures while web-browsing between 40 and 45 degrees Celsius.

That should cover all the investigation I've done so far! Thanks for your help.
Date: May 2, 2013   


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