[Ignisdraco]

I am at a loss with what to do with my computer. I have tried everything I can think of and nothing works. I play World of Warcraft and cannot seem to get my computer to work properly. My old video card is and Nvidea GeForce 6500 (256 mb). I have had no problems with this card until I got to the expansion part of WOW. Since then I would be playing and for no reason I lost graphics. Buildings disappear, the ground, walls etc.. I have to completely log out of the game to get them back and sometimes I have to restart my computer. I lowered my video settings, but that didn’t help. I downloaded the latest drivers and that did not help either. I bought a new video card, VisionTek ATI Radeon HD 2600 Pro (512 mb). I have not lost graphics, but I do get a whole different problem. My computer began to reset on me. I turned off the resetting on error and I got the PAGE_FAULT_IN_NONPAGED_AREA 000000x50.
I keep getting this error. I thought it had something to do with me running Ventrilo at the same time so I didn’t load it and my computer still gave me the blue screen. I tried uninstalling Ventrilo and got the same problem. I deleted all my drivers for the video card and re installed, I did this for each one. I got rid of all my old drivers for the GeForce when I installed the new video card. I have updated all my drivers for my mother board, ran Norton and AVG with nothing detected. Here are the specs that I have with my old video card.
Mother board: Asus P5WD2 Premium

SYSTEM TAB
OS: Windows XP 5.1 build 2600
Processor: Intel Pent 4 CPU 3.00 GHZ (2CPUs)
Mem: 1024 MB Ram
Directx: 9.0c (4.09.0000.0904)
DISPLAY TAB
Name: Nvidea Geforce 6500
Version: 6.14.0011.6375
Date: 10/4/07
DDI version: 9 (or higher)

I bought another new video card in hopes that it might fix my problem. I bought a NVIDIA e-GeForce 8500 GT. 512mb DDR2. When I installed it, my game play was ok for about 20 minutes and then my screen froze except for my character that was jittering back and forth. There was also a black triangle on my screen. I hit alt-tab to get to my desktop which had really messed up colors. Then my screen went black and my monitor said “no signal found”. This has happened repeatedly now.
I researched what I could on the internet and followed some suggestions. I have exhausted every possibility that I can think of and I really hope you can help me. Thank you for your time. I look forward to hearing from you.