> if it goes up to x850

That would be R400 then. Drivers not only for R300 but R400 as well would be nice indeed.

> the fastest possible flashable card would be a
> Sapphire X800 XT Platinum Edition i think :)

I believe an X850 XT Platinum Edition is even faster. Or can't you flash such a PC card with a Mac ROM for X850 XT?

true, but there is no Mac X850 XT PE. only OEM and also the rom of that card available. the X800 XT PE should be faster than the OEM X850 XT :) also it should be possible to flash the Sapphire with an oc'ed OEM Mac X850 XT rom, bcz. of the same graphicchip of both cards.