I've just got a 2nd hand Asus P5Q-Deluxe to use as a dedicated folding rig. Currently it only has an 8800GTX in it, but I'd like to add more cards. The board comes with 3x PCIe 16 physical slots and will take 3xgraphics cards from what I can see, just not use them all as Crossfire or anything fancy. If I add a 2nd card, it will give me 8x and 8x for the GPUs which is fine, but if I add a 3rd card it'll get only 4x lanes. Are there any issues regarding ppd output that anyone has come across, or worse, cards just not running with only 4x lanes?