Don't get exceited, it still doesn't work...
After searching everywhere for an XP fix I decided to format and put Win 2000 Pro on.
There is an AMD Win 2000 registry patch for this exact problem. Didn't work.
I have a new 340 Watt ps that I put in last night.
Updated the BIOS, Via 4 in 1, Audigy, Omega Radeon 8500 W2000, Win2000 SP2. It's all current.
Loaded Q3A. Played for about 40 seconds - froze
Changed the AGP to 2X, 64mb from 128mb, disabled video shadowing and cacheable RAM
Played for 1 minute, about when I usually freeze the screen shrunk then expanded again, kept playing
3 minutes in all I saw were triangles in place of nice graphics.
4 minutes it returned to normal.
5 minutes it froze.
Made progress, not much...
I'm going to install my Hercules 3D Prophet 64 and return the BIOS to normal. I get 200FPS with my current PC setup and that card. A big F U to ATI. I've tried 3 cards, 1 doesn't work in 2 operating systems.
I'm not installing 98.