Quote:
Originally Posted by albee1952
Hmmm, the machine has 8 slots so please educate me on why using 6 is optimal(no sarcasm here, I really would like to know more  ). Without empirical evidence, I would be inclined to fill the last 2 slots for a total of 64GB(but I'm not sure that the 5,1 uses RAM in the same way that my HP z820 did. It also ran 2x XEON 6-cores and the RAM slots were divided so each cpu got half the slots). I ran 64GB(8x8) in that and it was a beast(wish I still had it!)  |
The ram slots are also divided in half between CPUs on the 5,1 Mac Pro too. Those CPUs are designed for triple channel ram. Adding a fourth will increase the amount of ram available to the system, but it comes at the expense of slower ram access by the CPU. Filling all ram slots means almost universally slower CPU performance.
I wouldn't bother adding anymore unless you are running out.... activity monitor and pro tools will reveal if that is the case.