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Random Restarting: questions on trouble shooting

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Last response: in Computer Brands
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September 7, 2013 5:49:32 AM

I have a Dell Insiron 530 from several years ago. I bought it new, installed a Nvidia geforce 9600gt, antex 450W PSU, and commenced to gaming. I stopped using the computer for a while except for web browsing occasionally. I decided to start gaming again, But when I tried, I was getting restarts randomly when Gaming or watching youtube Videos. I opened the computer cleaned out the overwhelming amount of dust, and replaced the PSU because of a faulty fan that would have been more trouble than it was worth to change. I replaced it with an E-power 600W.

I also replaced the rear exhast fan because it was noisy. I added a 120mm intake fan at the front of the case, and a 120mm exhaust fan on the case side.

I have re thermal pasted the northbridge, southbridge, Graphics card (what a pain lol) and the CPU.

I can run Furmark, and Prime95, and 6 HD youtube videos in the background for over an hour. GPU temp hovers at around 68C, CPU cores (speedfan) measure 48-50C.

After doing this sort of test (or even before from a cold start) if I open a youtube video set it to HD, and go fullscreen, the computer restarts anywhere from 10-60 seconds in. When gaming, it's usually around an hour, but sometimes earlier when I get restarted.

I have ran CCleaner, Malwarebytes, chkdsk, memtest, spybot S&D, whocrashed, looked through event viewer, unchecked "automatically restart".

I have replicated the problem with a different set of RAM, with a different Video card, with 2 different power supplys, and put my HDD in another Comp and booted from it (problem did not follow HDD).

What would you guys do? I cannot understand why furmark/prime95 together would run but not a youtube vid. I'm running furmark at fullscreen.

Forgot to mention I've also run 3DMark several times all the way through with no problems.

When the computer restarts, it's as if i pulled the plug, then immediately plugged it in and turned it back on. Any and all help is appriciated.
September 7, 2013 8:29:17 AM

I'm going to suggest replacing the CMOS battery on the motherboard, it's a cheap part and easily replaced - surprisingly (to me) a bad CMOS battery can cause all kinds of unusual behaviors in pre-builts.
September 7, 2013 6:44:37 PM

C12Friedman said:
I'm going to suggest replacing the CMOS battery on the motherboard, it's a cheap part and easily replaced - surprisingly (to me) a bad CMOS battery can cause all kinds of unusual behaviors in pre-builts.


Changed that today following your reccomendation. No change. I did swap the motherboard from an HP from the same year. So far so good. I can actually watch video. Im pretty sure the original Mobo is bad. There are a few swollen caps, and one has seeped a little. Probably from idling for so long all clogged up.
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