Pc apears to reset generally on gaming

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john2629

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Jan 10, 2014
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Hello. We have a pc (GA-MA790FX-DS5 mobo, phenom 8450 triple core) that has been randomely reseting during gaming for 2 years now, but lately can reset on 10-30 seconds after windows start. We suspected the graphics card and yesterday installed a new one (sapphire hd-7770). The problem persists. We installed windows 7 (after format), problem remains. We updated mobo chipset drivers, tried the card in the other PCI, removed and replaced memories but to no avail. Pc still apears to "reset" but you can hear the fans working, and after 2-3 mins it starts again and beeps fine. As a last try we laid it open on the side and tried stressing it to "see" the problem. When it "resets", graphics card fan suddenly stops working as if power stops on card but everything else (discs, fans, lights) apear to keep working. We removed fans gradually for 7+ to 3 but problem remains. Power suply is a thermaltek 650w and seems to be more than enough. Graphics card is not even warm and the fan is super new and clean. It can't possibly be overheating. We're at a loss. It seems we have tried everything. What else can possibly be wrong? Anyone has any idea?
 
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Onus

Onus

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Jan 27, 2006
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If it is an older Thermaltake PSU (has a little voltage switch), it is most likely overrated. With a HD7770, a 380W Antec Earthwatts would have no problem running your rig 24/7.
You say temps are good; does that include the temps of the VRMs on the motherboard?
 
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traxevc

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Dec 17, 2010
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As I was reading your post I was thinking 'this is typical PSU problem' and I was going to suggest you to go into bios and leave the pc there for ages and see if it is going to reset. However, as I was reading on your post, I am inclined to believe that something could be wrong with your motherboard, PCIe socket problem or something else on the motherboard. Try puting the card on a different PCI-express slot and see what happens. If same problem, test the PC with a known working PSU. If problem persists could be the motherboard. But do not rush to buy a motherboard just yet. Do this:

http://pcsupport.about.com/od/windows7/ht/automatic-restart-windows-7.htm

in order to stop the pc from reseting if there is a BSOD which is too quick to be able to see it. Then try to stress your pc again and wait for the power off to happen. If there is indeed a BSOD the computer wont reset, but instead you will be able to see the info on the BSOD (blue screen). You need to write down the BSOD code. Will look like something like this: 0x0000000001B. The last two or three digits are the ones you need to check out. Search on google what those digits mean.

If no BSODs etc, then probably a power/motherboard issue.

Let us know how it goes.

Regards.

 
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john2629

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Jan 10, 2014
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10,510
Hello. Thougth to post an update. Problem solved. A friend sugested to download a benchmark program aida64 and try to stress it in different ways each time. Pc overheated like crazy(reaching 95C at some points) but worked until the memory test, where it reseted on cache memory test. After a thorough checking, the benchmark states the 2 memories are the problem since one "apears" clocked diferently, yet on a bios or on windows hardware check it seems ok. We tried reclocking but the same numbers are the result in the benchmark, we decided on removing the memory one at a time and after removing the mulfanctioning one and stressing it, it seems to work. There have been resets ocasionaly like one or two like it did the past 2 years but not like it used to do lately.

Thank you for the insight everyone
 
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