I'm have a issue with a brand new computer that i just
built like 2 weeks ago. about going on the 2 week i
would start up the computer and the montior would
start showing the boot up and before it would load
windows xp up the computer would automaticly restart
itself but then the monitor would not work it would
say not signal. so would turn off the computer for 10
seconds and then turned the computer on and everything
worked fine. Then on other days everything would
start up perfectly fine and then between 10-30 minutes
it would do the same thing restart and the monitor
would say no signal. But then others time would be
playing a game our buring a cd and then it would do it
or it would go for 7 hrs and work like nothing wrong.
any help our suggestions would help me i'm stumped.
below is my computer and hardware info. I have done a
memory test and everything came out good. My cpu and
system temp our normal. I have updated all drivers and my bios to latest versions. running windows xp sp2.

POWMAX 450 Watt AMD & P4 Ready ATX Power Supply
MSI PT880 Neo-LSR Socket 478 Mainboard
Pentium 4 Processors (3.0GHz) 800 MHz FSB and Hyper-Threading Support
VGA XFX|GF FX5200 256M PCI RTL
HD 200GB| SEAGATE 7200 ST3200822A %
SOUND BLASTER|PCI 128 CT4751%
1 GB memory
also two case fans runs about 1500-2500 rpms and 1 cpu fan runs about
3000-4000 rpm
cpu temp 118-130 F
system 85-93 F

Welcome to TechSpot

That was quite a mouth-full to read! Please make shorter sentences next time.
Go into BIOS and check that the first graphics card is set to VGA and not AGP, because you have a PCI-card, and not an AGP-card.
Move the graphics card next to the AGP-slot if it is not there already. Check that all other cards and your memory are properly seated.
If there is a fan on the graphics card, make sure it is working and not full of dust.
Stick the soundcard in PCI-slot 3 or 4.
See how that goes.

Never Worked

I placed the video card in the pci slot below the AGP slot and went into the bios and it does state its on PCI. it worked for about 1hr and then it rebooted itself and no signal went to the monitor, also placed sound card in pci slot 4

Does the CPU-temp remain the same or does it get hotter by the time it crashes?
Take a note of the temperature every 5 minutes, then you can see if it gets hotter by the time it crashes.
Did you install the proper mobo-drivers from its CD?

cpu temp

the cpu temp ranges from 118 f - 132 f and the system temp ranges from 85 f - 93 f, the temps go back and forth, also i've notice its doing more of the issue as soon as i start the computer it loads half away before it loads the into windows and then restarts and no signal goes back to the monitor

Try another graphics card or try your card in another PC. Swap monitors as well. One of them probably has a bad connection or loos contact somewhere.
You can also try to swap the video-cable if it comes off the monitor.

PowMax is issue

I know this posting is old and I don't know if you have fixed the problem but I had the same power supply as you. Cheap and lots of power I thought that is until I started having the same problems. Even though PowMax will replace it under one year warrenty I dumped that crappy power supply and bought a Ultra X-Connect 500 watt power supply. Only cost me $105 with shipping. Quite a deal and the best power supply I have ever owned. Look into that.

restarting pc

this happend to my pc aswell, i re-formated my pc and kept running spy bot s and d every day or so, its been ok since.

Hello,

As i saw you read dump as a guru I have mine in a thread under Windows OS:

http://www.techspot.com/vb/topic93073.html

What is issue? It is happening on all Windows 2000 workstations when I try to connect remotely and if the user trying to login does not have already a profile created locally....

Thank you,
Dominique