Note: If you install different-size DIMMs in your Mac Pro, follow the order in the table.

If you install equal-size DIMMs (for example, all 1 or 2 GB DIMMs) in your Mac Pro, Apple recommends that you fill the slots in the order listed in the table.

The arrangement is not what you would initially think logical. That machine will take 16's - my 3,1 does, to an unofficial maximum of 64GB. Obviously we're getting mixed messages with the info above about being able to accept much larger memory configurations, but in practice things get quite whacky. Two of the DIMMS are being recognized while the others are not, even though there are 4 GB DIMMs in place and 4 4GB DIMMS: What kind of issue is going on here? Upon installing these, my system still shows 32GB of RAM, but the 7 & 8 DIMM slots are showing empty now at this point. I subsequently returned this RAM and acquired 4 8GB DIMMs. I then purchased 2 16GB chips in hopes to raise the amount of RAM, however my system would simply not start up at all. I initially had an arrangement of 8 4GB DIMMs. More recently, OWC yet again discovered these dual processor models can support up to 128 GB, but only when running a 64-bit version of Windows XP or later or Linux. The MacBook Pro 2,2 can actually address 3 GB of RAM if you install 2 matched pairs of 2 GB. Use matched pairs of 1 GB per memory slot. Maximum memory supported (MacBook Pro 2,2): Apple lists 2 GB total.

OWC first confirmed an actual maximum of 64 GB of RAM running Mac OS X 10.5 'Leopard' and later increased this maximum to 96 GB of RAM running Mac OS X 10.6 'Snow Leopard' or higher.įull Specifications What's new in version 3.3.1 Fixed the manifest bug. Systems with dual processors, which notes as the 'Eight Core' and 'Twelve Core' models, likewise officially support 32 GB of RAM, but again, OWC found they actually can support more. From what I have read as per it should be possible to have far beyond the normal maximum noted by Apple: Actual Maximum RAM.

I have a MacPro5,1 with 8 cores (2 quad-core processors) running OS X 10.10.2.

Max ram mac mini mid 2010