My PC setup (10 month buy):
MB: MSI Z87-G45
CPU: i7 4770
RAM: 1 Dimm Crucial Ballistix 8GB 1600Mhz
HD: SSD SanDisk SataIII 64MB
VGA: MSI N650 (Geforce GTX650 1GB DDR5)
CD/DVD: DVD-RW Samsung SH-224DB
CASE: Corsair Carbide 200R
PSU: Corsair VS450
I use the on board vga (Intel HD graphics) too for second screen.
I was using the OC settings provided by the MSI Command Center utility that comes with my MB.
10 months not a single problem. Pc usage: games (browser-flash and stand-alone), movies, code development (web, databases, wamp, sql server, php/html, etc).
As of lately my PC started to reboot at random occasions. No blue screen, no memory dumb.
Firstly I thought temperature so i monitored with Command Center, Core Temp, CpuZ and brought back the OC settings to the "default optimized" as the BIOS says.
Tested memory with the windows built in utility (mdsched) and no errors came up. Run boot memtest86 (3+hours, 4 passes), no errors.
Installed and run the furmark test for gpu with no errors or reboots (setting 1280x720, for some reason it wouldnt launch the max setting 1920x1080 cause it said it couldnt go fullscreen).
Run the cpu burn-in test of furmark, no errors, max temp 68 C.
Run the system files scan-repair of win (sfc /scannow) which found and repaired some damaged files.
Disabled the onboard graphics card (and my second screen too).
Last I made a BIOS update and a full format / clean installation of windows.
After the clean installation, on one card/screen, I opened 3-4 different browser windows with many tabs, with flash player on them, online games, youtube, "heavy" websites,etc. At the same time run a full AV scan, opened and closed various applications, etc. So i got a RAM usage of ~70%. No reboot.
But when i left the PC open with the AV scan and an online game running and check back after 1 hour the PC had rebooted.
Plus later (having renabled onboard grapics-second screen) i installed some more applications (sqlserver, codelobster, etc) all fine and sometime after I had 3-4 reboots back-to-back practically with nothing running (only chrome with 4-5 tabs, email, etc).
All in all, seems that the reboots happen less often when onboard graphics disabled but still happen. And those reboot occurrences are not following any pattern or particular actions or apps.
So Im trying to figure out what might be causing them.
Is it the PSU? Is it some hardware fault on MB? Is it a faulty Dimm? Is it an HDD fault? Any suggestions?
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reboots randomly