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System shuts itself off

J

joejccva

Senior member
I am having issues I think with my PSU but I wanted a second and third opinion on the matter. I'm not sure if it's my video or CPU either but some people have told me that it's my PSU. Asus tech support of course says that my 430W PSU is more than enough. They don't know I was overclocking a A64 3200+ Venice to 2.75ghz (275x10). But I have been running fine doing tests.

Read on below for the problem:

My temps are fine. According to Speedfan under 100% load, CPU: 42C, MB: 34C, Chipset: 45C, Harddrive: 29C

I think the problem is that I run a 6600GT and it has no power connector on it and it's using the same rail that the rest of my system is on. I have a Antec TruePower II 430W dual rail PSU with 17A on each rail. Problem is that my entire system wants to use 1 rail instead of splitting between the 2. So it's getting overloaded. And now I think my PSU is damaged because even at stock settings now, when I boot to windows my pc shuts itself off after like 30 seconds. One time I was in BIOS for about 3-4 minutes and the PC shut itself off. It's either overheating or damaged because it got overloaded I presume when I tried running games.

See I had overclocked my system to 2.75ghz and ran prime95 and memtest86 for HOURS on end. Probably about 24 hours total for both prime95 and memtest. No errors, No problems. Well, I didn't test 3dmark05 or run any games yet and I tried to overclock my gigabyte geforce 6600GT card. All I upped it to was 505/1005 from the stock settings of 500/1000. When I did that it was fine, but when I tried to run 3dmark05 my machine turned itself off automatically. I booted back up and tried again, turned off again. So I thought it was my overclocking of the cpu, I went back to 500/1000 and I went back to default settings in BIOS..booted back into windows and 3dmark05 ran fine. Games ran fine. Then I tried overclocking it back to 2.75ghz and my pc turned itself off after trying to boot into windows. So I figured I must have damaged the cpu or mobo or something, but people were telling me that it's probably my PSU is dying now because it got overloaded.

I was going to get a 500W Single Rail PSU.

Anyone have any suggestions on what my problem could actually be?
 
First of all I would recommend you set all clocking back to normal (both CPU and GPU) for the duration until you solve this.

I recommend the following steps to see if it helps:

- Have you tried running MEMTES86+ for SEVERAL HOURS? If the computer doesn't reboot during MEMTEST then I'd say that your problem is probably not CPU, Memory or PSU related. Might be a Windows issue. If it does appear to happen only in Windows then make sure that auto-reboot on error is disabled in Windows (right click My Computer, Advanced Tab, Startup and Recovery, and uncheck "Automatically Restart". With this disabled you might actually see an error message instead of a reboot.

- Have you put a digital meter on you 5 volt and 12 volt buses? Don't rely on a motherboard monitor - pickup a cheap digital multimeter at Radio Shack and test your voltages under load (running a 3D game). You can measure 5 and 12 volts at any spare hard drive connector. Voltages MUST be within 5%.

- Load the SAFE DEFAULTS in BIOS.

- Disconnect all wires and cards except the vid card and primary IDE. Make sure to disconnectt he power switch (you can turn the computer on by shorting the power switch pins with a screw driver). I've seen situations where the power switch had an intermittent short and would cause the PC to shut down. Also a bad card or cable could be shorting the reset bus.

- Have you got any kind of spare PSU at all lying around to test it with?

Hope this helps...


 
Also, do you have all of your motherboard's power plugs hooked up? Besides the 24-pin ATX2.0 and the 4-square ATX12V, it also has the third one, the type that a CD-ROM drive takes. Illustration of where it is, the one marked EZ Plug.
 
Originally posted by: mechBgon
Also, do you have all of your motherboard's power plugs hooked up? Besides the 24-pin ATX2.0 and the 4-square ATX12V, it also has the third one, the type that a CD-ROM drive takes. Illustration of where it is, the one marked EZ Plug.
Click to expand...


I'm only running 1 geforce 6600GT card so I didn't plug in the EZ Plug. Didn't think it mattered.
 
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