I have two displays connected to my MacPro (Ati 5770). Does OSX split the 1Gb between the two displays, or does it depend what is on each? Is there a Terminal command (or app) which displays this information? Also, what would work better if I was to upgrade, two 5770's (one display on each) or a 2Gb card (now there are a few more options) with both displays? I hear two 5770's eat a lot of power!