These are the specs: Two 2.4GHz Quad-Core Intel Xeon Westmere processors 6GB (six 1GB) memory 1TB hard drive 18x double-layer SuperDrive ATI Radeon HD 5770 with 1GB GDDR5 I plan on adding my own intel SSD to it. And another 1.5TB HDD to it. Anyway, my biggest question is about the noise and the fans. What are the size of the fans in the Mac Pro? Are they 120mm? I couldn't find the specs for them anywhere. And are they easily replaced? I'd like to use my own fans. Also, will there be enough space to add a dust filter to the front intake fan? Also how is the dust situation in it? Does it get very dusty? Also, from what I notice, the CPUs are passively cooled by huge heatsinks, but I am wondering if they do a good job keeping the CPUs cool? Also, I am completely out of the loop, but what is the best card available for the mac? Is it the 5870? And also what are the specs of the PSU? I read that it is 1200 watts from somewhere, but I can't verify it. Can anyone shed some light on that?