[quote Fritz]http://forums.macresource.com/read/1/275921/275986#msg-275986
512m's, 1G's, 2G's or does the system not care?
I always buy the max that will fit.
I ASSUME that you have 2X512MB now??
Buy 2X2GB that will give you 5GB which is really minimum in my book.
From The Memory PDF.:
"Note: The Mac Pro computer has two memory riser cards with a total of 8 memory slots. On each
card, the slots are arranged as two banks of two slots each. The computer comes with a minimum
of 1 GB of memory, installed as a pair of 512 MB fully buffered, dual inline memory modules (FB-
DIMMs) in two of the DIMM slots. Additional DIMMs can be installed in the open DIMM slots, as
illustrated below.
DIMMs must be installed in pairs of equal size from the same vendor. In the illustration below,
DIMMs in one colored pair do not need to match DIMMs in a different colored pair."
http://manuals.info.apple.com/en/MacPro_...MM_DIY.pdf
BGnR
16GB here!!