I have a curiosity on the ATI Radeon X1600 equipped on the Intel Macs. From what I've seen on Wikipedia, there are the "Pro" and "XT" versions of the card. The two differ in that the XT has faster core and merory clock speeds, higher fillrate and bandwitdth. i dont know much about all these specs, but from the little i know i conclude that there is some significant difference between the two. My question is: Which of the two is equipped in the Intel Macs??