Well everyone, in case you were wondering, I finally found the source of my problem. Can anyone take a guess?
After the last few posts on this topic, I sent in my video to ATI. It was going to take a few weeks, so I had my old All-In-Wonder Radeon 7500 as backup. I plugged that card in, and everything was fine... or was it?
To make sure it wasn't a heating problem, I upgraded a few things on my computer. I bought a PCI Slot-Fan which would be placed directly under the video card. This way, all the hot air from the video card could be sucked out. Then, I replaced the positions of all my PCI cards to make sure nothing could cause the video card to heat up. FInally, I ended up buying a smaller, more efficient case, that had a LOT more fans. Good move... I thought.
At first, everything seemed to run fine. My Radeon 7500 loaded up fine, the video display was perfect, and all was well, but about 2 weeks later, I noticed that this video card was doing the same thing as my 9600XT. At first I thought it was a fluke (ok, I was fooling myself). But, it began to happen more and more. So my first reaction was "Man, I just bought all this new equipment, just to find out its my motherboard." That bummed me out. But I wanted to be sure it was my motherboard. So, I took out the video card, and was going to place it in a space computer. Once, I took out the video, however, I noticed something. Being the curious person I am, I just had to spin the fan on the card. When I tried to spin it, I noticed it was EXTREMELY difficult to spin. That caught my attention. So, I plugged the video card back in, and turned on the computer. The fan never spinned. "PROBLEM SOLVED!" I thought. Wrong again.
I took out the 7500, and placed back in the 9600XT (by this time I had the card back). 3 Minutes after turning it on, the display became corrupted. So now I'm ticked. I'm trying to figure out what the heck is going on. Finally, I just leave it alone for a little while.
After a few hours of doing nothing
, I go back to computer. I turn it on, and it works (for a while). While I had it on, I decided to run Hardware Monitor, my motherboards temperature program. All the temperatures were running fine. But the 12V was fluctuating way to much and was going below the allowed threshold. Then it hit me. I turned off the computer, opened it up and pulled out the ATX connector from the Power Supply. BOOM! There it is. The +12V section on the connector was browned out (see photo below).
After some research, I find out that AGP ports typically run off of the +12V power of the power supply (unless they have their own power supply connection). So, I threw in my brothers power supply, left it on for the night, and checked it in the morning. No problems. It appears that the power supply has been the culprit all this time. Go figure
Anyway, I ended up buying a new power supply (Antec NeoPower 480), and a new motherboard. Everything is running fine now. So, thank you to everyone who tried to help me figure out the problem. I hope this helps everyone else who might have this same problem.
Sorry for the long post