I've got short lines all over the screen and resolutin is stuck on 600x480 4 bit/can't change it. New card/reinstalled 3 times/ same results. Reinstalled my Radeon X800se every time, runs fine.
Looked for AGP updates/KN8 Triton MB didn't find any. Anyone have this problem? DX file attached...thnx for any suggestions.

I'm thinking PS Unit at this point, you are using the supplied Y-Power Adapter Cable I take it for the auxillary power for this card correct ?!?

I wonder if the +12vdc Power Rail on your existing PS Unit just does not quite have enough power/current for that added graphics card.

Of course checking with Gigabyte for any BIOS updates to see if this is a known issue with thier MB may help too.