Yes, this is a common indication of a failing psu. A capacitator or resister starts to go bad and at a given heat level, it fails or causes an automatic shutdwon to try to protect the rest of the computer. You might have a monitering program from your motherboard which will tell you voltage levels from the psu, such as ASUS Probe, or something similar. If so, take a look at the readings and see if any are off spec. Another thing to do is to download and use speedfan to moniter temps. Even these may not help if the psu just fails without warning, that is, no rise in temp or change in voltage.
Do check in the BIOS to make sure you have the required amount of voltage for the cpu and ram. Sometimes the default voltages will be too low for the ram, i.e., running 1.8v when it should be 2.1v, or some other variance. But if the BIOS voltages are set right, the main suspect I see is the psu, and if the psu is going bad, its best to replace it before some hardware gets damaged.
I'd say the memory. I had the same problem - run Memtest86 and if it fails manually set the timings and voltage per OCZ (their tech support is good so try them too). If their is still failures (ANY failures) the memory is bad and should be returned to the store you got them from (or OCZ if you want to do that).
I had the same problem....Check the connector from the PSU to the CPU power connector. If you have a 4 pin one connected, remove the plastic from the other four pins and connect the 8 pin from the PSU. They should be on the same cable. I have a P5B Deluxe, so I'm sure your mobo is the same. PM me to tell me if it worked or you need a better explanation.
EDIT: I just checked and saw that there is no 8 pin power connector for the P5W DH. Reseat your memory. That might be the problem.
I am actually having second thoughts on the Corsair.
I was able to find the OCZ GameXstream 700watt for only 103 after rebate on Tigerdirect.com
That is an amazing deal. The only thing the power supply is lacking is modular cabling. However, I think I should be able to find some nooks and crannies in my case to hide the cabling.
Should I go for it?
I have one more question.
Whenever I start up my computer, in order for my monitor to work (Apple 23" Cinema Display) I have to pull out the USB plug, and put it into another port
Does this have to do with the power supply?
You need a USB to run your 23" for what reason?
Isn't it run off your DVI cable?
Or is it just the USB hub on the monitor wont work until you move USB ports.
Make sure the USB ports you are using from your mobo are powered.
For some reason the apple display uses a dvi cable PLUS a firewire port and a usb port.
The monitor WILL NOT show a picture until I switch the usb plug for some reason. This has not always been the case though, which is why I think something may be wrong with the power supply as it is not giving enough power to all components and is not running properly.
Well I am about 99% sure its your PSU.
Any time I have encountered a faulty PSU it starts blowing hot air.
If you have decent cooling in your case, it should be room temp. from the PSU.
Also to confirm your PSU may be faulty is that it's not supplying enough power through the USB cable to the monitor.
Like everyone else has suggested, a new PSU may be in order. You may have a buddy you can sell your existing PSU to for cheap, but let him/her know the problem and if he/she encounters any problems just don't have them pay you for it. Let him/her take it for a trial run for a couple weeks on his/her system.
This could also confirm if you PSU was just not enough power or defective.
I will be using the computer and BAM screen goes black and computer turns off.
The computer most of the time tries to restart.
Yet the computer seems to have some power problems, as my cold cathodes start spazzing and sometimes the the computer shuts down/restarts multiple times.
I really think it is a psu problem, thus I will get a new psu that can handle my system (OCZ GameXstream 700 watt). At the same time I will return the power supply to the manufacturer and then resell the replacement they send to me.