ATI and DirectX problem, anyone?

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GfK

My drivers are up to date. I should add that Vista runs like a pig too, if I switch to a basic theme instead of Aero.

Also tried the latest Forceware Beta drivers.

I think I'm using the latest BIOS but my motherboard's getting a bit old.

[edit] My motherboard is an XFX Mach4 KT600-ALX (socket 462). I'm not on that PC at the moment but I'm sure the current BIOS version is 6.00PG. Any idea where to start finding out if there's a more recent version? An hour of googling has turned up very little and obviously I don't want to get it wrong.