PC Turning itself off

wlsmith1985

wlsmith1985

wlsmith1985

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Joined
4 Oct 2011
Posts
82
Hi Guys

Been having issues with my pc spec is as follows:

IvyBridge 3570K @ 4.6GHZ
MSI Z77 MPOWER
Kingston HyperX Genesis 16GB
OCZ Agility 3 120GB
Hitachi Deskstar 3TB
2 x Gigabyte WF 3GB 7950 in crossfire

The issues I am having are as follows, the pc will be on for a certain amount of time usually a few hours then it will just turn itself off like there is a powercut, after this occurs it will turn itself on again and then immediately switch itself back on but then turn itself off again, if you then leave it for a few hours it will be fine and boot into Windows 8 but it will do the same thing again a few hours later. The motherboard has been changed it previously had a Z68 GD65A which was faulty and was RMAd, The SSD has been replaced as this was faulty and was hanging, I have tried adjusting voltages on my overclock as I thought this might be causing stability issues but this has not solved my problem, I have also checked RAM voltages which are 1.65v and running at 1666mhz (4 sticks of ram in a dual channel set up), but I am still having problems, I have even changed the SATA cable for the SSD and it is plugged into port 1 but im still having trouble, the SATA is set up to run in AHCI mode. The motherboard has been updated to the latest Bios too

Any ideas? Im really struggling here

Cheers

Will
 
Hello

First thing I'd do is take the overclock off and see if the problem persists. How long have you had it overclocked, and have you torute tested it etc? It sounds like it could be a heat issue and it's shutting down to protect the cpu.
 
I had same, new psu fixed it. 1st, Disable Automatic Restart
http://pcsupport.about.com/od/fixtheproblem/ss/disable-auto-restart-windows-7.htm

Dont think you,ll get a bsod, but worth a try. Bet you have many
Kernel event ID 41 errors. My old psu was crammed with dust so maybe that was it. Never happens with new psu.

Windows Kernel event ID 41 error "The system has rebooted without cleanly shutting down first

http://windows.microsoft.com/en-gb/windows-vista/open-event-viewer


http://support.microsoft.com/kb/2028504
 
Last edited:
As above, it'll be the PSU tripping and killing the system. Had the exact same thing a couple of months back. Out of the blue my PC would just start hard resetting, no errors, no blue screens, and when it came back up every test would say its all working fine (no errors in mem test, CPU would pass prime and IBT fine, games would work perfectly etc), only for it to switch off seemingly at random while doing something mundane.

I switched out the PSU (a 5 year old HX620W) for a new one (CX750W) and it's been rock solid since.
 
PSU is less than 3 years old and is a 750W... Admittedly I havent changed this item yet, reckon i should just buy a new one? also im running Windows 8 so dont think the above will help?
 
is the cpu temp ok?

remove the overclock, try to run the memories at 1333 and 1.5v, remove one or both graphics card and use the onboard one if possible... if it works with onboard video try to put one card back.. then put the memory and overclock back.. and leave the 2nd graphic card for last.

but I also think it is the PSU your problem.
 
is 750W enopugh to run that OC and 2 x 7950 in crossfire with all the other components and peripherals ? It might be struggling to provide enough juice on the 12v rail ?
 
I'd first check the power socket on the mobo, Give the wires a wiggle & see if it cuts out, The insulation on mine had gotten hard & the way I formed them caused the stress to move them enough to cut the system out then back on again. Took me ******* ages to find out what was causing it. :p
 
Temps on overclock were generally ok, i was stress testing under intel burn test and they did reach around 90 degrees, that is under water too! so yes they were quite high but stable none the less.. I will have a play with the memory tonight and power supply cables and see what that brings up and then report back to you
 
PSU make/power should be in your spec list, as they are very different. A cheap 750w psu is no good.
 
ok... ive removed all the ram barring 1 stick, disconnected the 2nd graphics card, checked the power connections to the board, all look good, have reset it to default speeds on the overclock and its still playing around, this is a real nightmare lol
 
just tried doing intel burn test as it seems to happen more regularly when doing that, checking the onboard motherboard temp and its not going above 60 degrees.. currently it is not doing it and is running the maximum stress test on standard settings with no overclock, so I definitely think this is heat related, is there a way to disable/change the shut off feature on the board at all? obviously I don't want to damage/overheat it but I want to run a moderate overclock without it being a pain in the ass ;)
 
well, it just did it again, temps were not even above 60, but it happened whilst running intel burn test on stock settings after it had completed about 5cycles on maximum!

Im absolutely stumped now!
 
wildman said:
is 750W enopugh to run that OC and 2 x 7950 in crossfire with all the other components and peripherals ? It might be struggling to provide enough juice on the 12v rail ?
Click to expand...

I have 2x 7950@1000mhz, i7 3770k4.5ghz, 3 ssds, 2 hds, a fan controller, around 10 fans and from the wall it uses max 550W in normal use... if i use stress tests everything running 100% it jumps to 600W.

But his PSU could be defective.
 
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