Please BB, can you update us on the problem? I have 2 5900 Ultra's and they both flicker on Via KT600, nforce1, nforce2 and nforce2 400 Ultra chipset motherboards. I have also tried 3 different monitors and 3 differnt power supplies to no avail. My ATI 9800 pro is crystal clear on these systems. If no resolution is found these 5900's are going to be sold for ATI 9900's soon.
Please respond to this soon Nvidia,
AMD 6000+ X2
BFG Ageia PPU 128 pci
Audigy X-fi Audio pci express
Windows Vista Home Premium 32bit
Windows XP Pro 64bit