So I've been told that my ram configuration in my MP 5,1 12 core is wrong. Is this configuration recommended? 20 gigs
Mac Pro, OS X Mavericks (10.9.4), 20 gigs ram
For 2009 and later Silver Tower:
Densest modules (4GB in your case) go in lowest-numbered slots. Each side does not interact with the other side (but you should strive for roughly balanced when possible) and pairing does not provide a speedup.
To me it seems correct. Have you had any issues ?
No problems at all..and the memory slot utility does not come up. I posted on another forum that I had 20 gigs of ram and people were saying that it's wrong...maybe because it's 20 gigs instead of 24? I don't know. From the chart that IIIaass posted, and what Grant suggested, looks like the 2 4 gig sticks should be in slots 1 & 2, and the rest of the 1 gig sticks fill out the rest. I'll change it for grins.
Since each side is independent, best results will be from 4GB sticks in 1 and 5. But the difference will probably not be measurable.
Yes Grant, you are correct. I moved the ram and Memory Slot Utility came up and told me the 4 gig sticks should be in slot 1 and 5 for best performance. Rest of the 2's fill it out. Going to do that. Not sure why someone told me 20 gigs of ram is "not correct in any way".
20 gigs of ram is "not correct in any way"
Apple had options to ship some of the 2009 and later models with 3 or 6 @ 2GB DIMMs installed, and that is what performance -minded Mac Pro buyers may have specified.
The price of one 8GB DIMM has been essentially the same as the price of two 4GB DIMMs for a while now. So if you were to buy today, you would not want anything smaller than new 8GB DIMMs. 8GB DIMMs you buy today should mix happily with older modules. Today's 16GB DIMMs tend to be "Registered" DIMMs (they require an on-DIMM Register to manage multiple ranks of data chips) and these do not play nice with others.
I expect the speaker you are quoting is assuming you do not have any of the older 1GB DIMMs, so is assuming you have some that have failed back to having half their stated size.
Mac Pro 5,1 12 Core Ram Configuration
