can anyone tell me if the new mac pro's are able to use/run normal DDR2 RAM chips? Do I have use only FB-DIMM chips? I realise the FB means "Fully Buffered" and allows for read and write simultaneously to RAM. But i wounder if more RAM (DDR2) is better than less(FB-DIMM). The price difference is huge at my local computer store and i wonder if upgarding (if possible) to more DDR2 RAM chips instead of FB-DIMM is faster?