- MacPro4,1 memory does not need to be installed in matched pairs.
- Maximum installed memory:
4 RAM slot models - 64 GB
8 RAM slot models - 96 GB (OSX max useable RAM is 96 GB)
- 240 pin DDR3 - 1066 MHz PC3-8500 ECC SDRAM.
- Heatsinks are used on higher density 8 and 16 GB modules.
- Memory is contained in slots on the CPU tray at the bottom of the MacPro. You can install memory in different size DIMMs following the order on the tips page. If your configuration is not the best possible the the Memory Slot Utility should appear. You can check your memory configuration any time using the Memory Slot Utility, it is located at /System/Library/CoreSystems.
MacPro4,1 memory installation
Apple has kindly provided a memory installation guide page specifically for the MacPro.
The MacPro has built in space for a total of 4 internal 3.5 inch SATA drives connected to an Intel powered SATAII bus on the motherboard. There are also 2 spare connectors on the motherboard intended by Apple for future conversion to SATA optical drives to replace the Parallel ATA drive bus used with this model.
All SATAIII retail drives sold by MacGurus are perfect for installing inside your MacPro in any of the factory trays. The current capacity king, the 3TB Hitachi Deskstar, works extremely well inside the MacPro delivering up around 150 MB/sec transfer speeds, which is awesomely fast!
Cooling for 4 drives in the MacPro is on the edge of sufficient. Today's drives, even the big 3 TB Hitachi, are cooler running than any previous models. So they are easier to maintain reliable operating temperatures. However we do not recommend more than the 4 hard drives that Apple's engineers designed for. More than that and temperatures for all internal components goes up, and the result is reduced component lifespan.
From the factory this model MacPro shipped with SATA connection optical drive(s). Adding a second second SuperDrive, or replacing the original couldn't be easier.
The Plextor Super Drives offered below are the finest drive available at a most reasonable cost. They are plug and play in your MacPro and will serve you well. We have used them exclusively in our Macs for years and unreservedly recommend them.
The MacPro4,1 has 4 PCIe Revision 2 expansion card slots. These slots are all physically 'full length' 16 lane slots.
Slot 1 and Slot 2 (bottom 2 slots) are electrically 16 Lane (x16) Revision 2 slots.
Slot 3 and Slot 4 (top 2 slots) are electrically 4 Lane (x4) PCIe Revision 2 slots.
A revision 1 PCIe card will operate at revision 1 connection in any slot.
Most any x1 through x8 card will run perfectly in the 4 Lane slots. High performance x8 or x16 cards will run best in the 16 Lane slot 2.
The PCIe lane settings are permenantly set. Apple has an excellent tech note with more detail on MacPro PCIe slot usage and configuration.