hello, so i want to upgrade my mac pro (its the previous model, 2006). I want to buy an SSD hard drive, but i wouldnt buy any disk less than 1TB. So, im not rly sure about how compatible the models are with my mac pro, in fact i only know its serial-ata. Any suggestions? Also, it has DDR2 FB-DIMM 667MHz memory. Can i use a higher bus speed ram? The layout is something like 4x512, which i got it to 8x512 because a friend had his mac pro (same model) asleep for 2 months. Now he got those back so here i am asking: Is "DDR2 FB-DIMM 667MHz" what i need to know to buy compatible ram? Is 667MHz the highest i can get? What could be the layout? Can i use 4x512 & 2x1gb? If you could answer to all those questions i would rly love you 