It seems that a lot of XT owners, including me, have problems with Ati tool beta9. It doesn't work properly, or doesn't work at all for some.

Now i wonder why Macci has no problems with it. If i take a look at his desktop pic (page 2 of this topic), i see Ati tool reporting 625/750 as default speed. Actual retail cards are showing 600/700 as default in AT. Retail cards have different 2d/3d speeds.
Macci's XT bios is different?