Power Supply, the culprit?

Hi, I've posted on numerous forums asking for an answer to my problem while playing Company of Heroes. (http://forums.relicnews.com/showthread.php?t=215092), (http://www.gamereplays.org/community/index.php?showtopic=454865), and I'm guessing it has something to do with my power supply. Could anyone possibly provide some insight? I have a 450w power supply, by the way.
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More about power supply culprit
  1. What brand? If it's a no name brand chances are pretty high it could be PSU. Please list full specs (ie CPU, Motherboard, OS,etc)
  2. It came from the Antec Case that I bought, which is actually a full server case. I know it's 450w and an Antec power supply. Other specs include:

    Wolfdale E8400 Core2Duo 3.0ghz
    nVidia 7950GT (512mb)
    Crucial BallistX Tracer (2x1.0GB)
    Seagate Barracuda 150GB (Windows only)
    Seagate Barracuda 320GB (Games, music, movies)
    ASUS P5K Pro motherboard
    Windows XP SP2
  3. Also, after scanning some other things on Tom's Hardware, I found out my 7950GT uses ~60W at load. So theoretically 450W - 60W = 390W. I highly doubt my other hardware is using that much. But as I am not a certified computer technician, I'd like some verification if at all possible. :D
  4. You need to know how many amps are supplied combined on the 12 volt rails. I would say that yes, the PSU would be the first thing to suspect. Can you list the amps/wattage off the sticker on the side of the PSU, if it has one? PSU's that come with the case are not usually spec'd very high. And if it came out of a server case, it is likely not capable of suppling enough amps on the 12 volt rails for the video card you have.
  5. On the back of the PSU I see:
    +5v 0v 0v +12v
    +5v/+12v --- 6a

    It's interesting because this JUST started happening a month ago, and I played the same game (CoH) about a year ago with no flaws.
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