Self built PC crashes when machine sits idle, then reboots.

SammyQ2

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Apr 18, 2009
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This has been going on for a year. I'm not getting a BSOD, I just come in and find that it has rebooted itself and all my windows and tabs are closed.

This is a machine I built up myself. I ran a 12 hour memory/CPU check and it produced no errors.. Updated the BIOS too.

Any suggestions? Thanks.

Windows 10 (x64) (build 14393)
Board: ASUSTeK COMPUTER INC. A78M-E Rev X.0x
American Megatrends BIOS 1401, 6/5/2015
Serial Number: 140424918000388
Bus Clock: 100 megahertz
UEFI: American Megatrends Inc. 1401 06/05/2015
3.70 gigahertz AMD A4-6300 APU with Radeon HD Graphics
96 kilobyte primary memory cache
1024 kilobyte secondary memory cache
64-bit ready
Hyper-threaded (2 total)
7368 Megabytes Usable Installed Memory
Slot 'DIMM_A1' has 4096 MB
Slot 'DIMM_A2' has 4096 MB
Drives
1119.76 Gigabytes Usable Hard Drive Capacity
982.00 Gigabytes Hard Drive Free Space

HL-DT-ST DVDRAM GH24NSC0 SATA CdRom Device [Optical drive]
HTC Android Phone USB Device [Optical drive]

Patriot Blaze [Hard drive] (120.03 GB) -- drive 0, s/n DA5A074A1FEE00931087, rev S9FM01.9, SMART Status: Healthy

WDC WD10EZEX-21M2NA0 [Hard drive] (1000.20 GB) -- drive 1, s/n WCC3F4UDSYK2, rev 01.01A01, SMART Status: Healthy
c: (NTFS on drive 0) * 119.56 GB 68.69 GB free
e: (NTFS on drive 1) 105 MB 11 MB free
f: (NTFS on drive 1) 1000.10 GB 913.30 GB free
* Operating System is installed on c:

AMD Radeon HD 8370D [Display adapter]
Acer X203H [Monitor] (19.9"vis, s/n ETLEV0C007906046FE4010, February 2009)
Planar PX2710MW [Monitor] (27.2"vis)

Standard SATA AHCI Controller
Microsoft Storage Spaces Controller
AMD USB 3.0 eXtensible Host Controller - 1.0 (Microsoft) (2x)
Standard Enhanced PCI to USB Host Controller (2x)
Standard OpenHCD USB Host Controller (2x)
 

SammyQ2

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Apr 18, 2009
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No symptoms under load that I can discern.

I thought of that, but I think it happens too often for Windows updates.

I guess I could pull a power supply our of another machine I have and swap it out. I currently have a Corsair 400W.
 

SammyQ2

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Apr 18, 2009
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After months and months of frustration I finally fixed the problem. I did a complete reinstall of Win 10 and all my crashing/rebooting problems went away.

I was getting ready to buy another motherboard.

Thanks to all those who helped.
 
My only thought right now is that the PSU is incapable of performing well at low loads. In 'ancient times' there were PSU's that couldn't deliver reliable voltages on some of the rails at very low loads, perhaps this is a similar scenario? I don't see that pulling more than 100W, and at idle perhaps as low as 50W.

A new install of windows may hit true idle less often as updates etc. come down and keep it busier.