Right, I'm in a bit of a pickle.

I previously had my Nvidia 8500GT 512mb working via EFI Strings, on my old Biostar AMD Mobo on Snow Leopard.
Now, that i've switched to an Intel Asus P5KPL-AM EPU, the same EFI strings seem to make no difference to anything, and it will only show up with 1280x1024 rez in VESA mode (i think)
It shows in the information bit, but only as 32mb, and not NVIDIA Geforce 8500GT and all the EFI strings malarkey, like it did on my previous mobo.
I've done a retail install, using the Snow DVD.

What am i doing wrong?