Hello all, I've been working on this issue for many hours now and have not been able to obtain a satisfactory result. I am hoping to gain some new insight and perspective in solving this problem. I recently purchased a Powercolor x1950 Pro Agp from Newegg. This card was meant to replace my old GeForce 6800 XT. I uninstalled the Nvidia driver, then installed the latest Catalyst driver from the ATI/AMD website. Everything ran smoothly until windows started up, which was when I observed very slow refresh lines--slower than those when no driver is installed. After about 20-30 seconds, my monitor would go black and the desktop would show itself again, except a lot of the icons would be missing. Opening the Start Menu would result in the same thing--text would still be there, but the icons would appear and disappear depending on where my mouse was. I decided to attempt a system restart, but this time the display would lock into a resolution of 640x400 @ 4 bit color, and attempts to change the resolution were fruitless. After two full wipes of my hard drive, setting the AGP bus down to 4x, turning off fastwrites, uninstalling the official Catalyst 7.2 driver and installing Omega 7.1, I've managed to achieve a stable, although probably slowed, system. Updating BIOS, monitor, and motherboard chipset drivers didn't resolve the issue. I'm currently sticking with the Omega 7.1 drivers because it's the set that works best under the circumstances. Any idea what might be going on? My system specs: CPU: AMD Athlon 64 3200+ Memory: 1.5 GB DDR 400 RAM Mobo: Gigabyte GA-K8U socket 754 Graphics: Powercolor x1950 pro agp PSU: Some server class brand, 450W, +12V 30A Any help is greatly appreciated. Thanks.