Hi guys - got an MSI KT3 Ultra2 main board (Via333) and AMD XP2100+. Just tried installing a standard ATI Radeon 9000.... now the machine turns itself off and won't boot back up again unless I pull te power plug... after 2 complete re-formats with Win2K.... Running 2 HD's, CD-ROM, CD-RW and the extra 2 USB plugs that came with the main board. Off a 350W PSU. I'm thinking that it's the PSU being crap meself.. any ideas? I've just oredered a 550W jobby to see if that will work.. Anyone know of any compatibility issues? Oh yeah, and it only turns off if you start any 3D shenanigans, like the benchmark I tried to run last night... :-s