Hey guys, real quick question here. Will DDR2 533MHz RAM works in Mac Pro? I found DDR2 533 PC2-4200P for a very good price and was wondering if it will work in my Mac Pro 3,1 (2008). It requires DDR2 800MHz but ive tested DDR2 667MHz and it works perfectly fine but thats because Early 2006 Mac Pro uses that. And if it does, how much slower is 533MHz RAM comparing to 800MHz?