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PSU going poof?

A

awdark

[H]ard|Gawd
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Joined
Mar 22, 2003
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1,633
I cant figure it out... I have posted in the mainboard section asking if its my computer overheating.. but I dont think its the thermal shutdown.

I have a 350watt raidmax or fudin powersupply.. I know the case is a raidmax... When I got it with the case a long time ago it was excessively warm. It has a FIC au13 nforce2 board, AMD 2600+ throughbred with stock heatsink, 512 ddr, geforce2, 120gig maxtor 7200rpm hdd, and a ATI tv wonder ve.
Recently I have been able to get the comptuer to shut down like I pulled the plug by running prime95 for 10 minutes.
The voltages according to the mobo stats on the 12v line is a bit off +12v is 11.8v the -12v is 13.23v. When its connected to my multimeter the voltages change about +/- 0.10v.

Once the computer goes down I have to unplug the psu and wait a bit otherwise the power light will do a few quick blinks and turn off. The last time that occured, I had to turn off my cold cathode before it would start.


Edit.. figured it out.. thanks for your help.
What happened was the wires I cut for my cold cathode were not sitting right or something... the cold cathod is probably dying. Unplugging it fixed the problem. Just have to figure out whats wrong with it now.
 
what are your load temps?

as for the voltages - 11.8V is not bad at all... maybe you could borrow a PSU to test your setup with?
 
Under full load it would go up to about 150. I know that thermal probe the mobo has under the cpu isnt very accurate but yeah its getting quite hot.. but it should still run.
 
Your voltages are fine, there's always some fluctuation.

It sounds to me like it's just overheating. It could be the power supply or the CPU. Assuming that's Fahrenheit, 150 degrees is equal to 51.3 Celsius, so it's not your CPU - those are normal temps.

So, the decisive verdict is that your PSU is at fault - it could be overheating or just overloading, but if it's 350w that's not likely the problem. Overcooked PSU!
 
Hrmm perhaps it has a thermal fuse in there that shuts it down.

The computer does use more power when the cpu is at 100% right? Or is it one of those things that uses a constant amount of power.. trying to figure out why the shutdown occurs.
 
Also, raidmax is not known for it quality. CPU power draw is directly proportional to usage. What hasn't been mentioned is memory: Run memtest and see if that might be at fault.
 
Oh... ill have to get memtest. I had to recycle my ram from the compaq to that computer. Its very possible I cooked the ram when I blew the clock thingie on the motherboard.
 
Okay ran memtest86 v3.1 took about half an hour.. and it didnt give me any errors. I think I will have to go and connect my mutimeter to the psu. How much fluxuation is normal and how much is not good.
 
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