I've been reading up on the ati physics/crossfire combo and am wondering if anyone is currently running it and if they could shed some light on it. i just got these two 2900xt cards so i have x1900xt sitting here and my badaxe board has a third pcie slot so i was thinking about using the x1900 as a physics card. the ati/amd website is pretty vague on this area and doesn't give much info on actually setting it up or compatibility. http://ati.amd.com/technology/crossfire/physics/index.html http://ati.amd.com/technology/crossfire/physics/Asymmetric_Physics_Processing_with_ATI_CrossFire.pdf is this setup automatically recognized by the CAT? i just cant seem to find any info on actually setting it up. it only refers to the x series of cards on the site so i don't even know if its possible on the r600 gpu. im just wondering if anyone knows if you can still do this with the r600 gpu series of cards and if so can i mix a x1900 with the two 2900's? i want to see if i can make the meter on the side of the house spin faster so i figured why not 3 power hungry video cards, hehehe.