- MacPro1,1 memory must be installed in matched pairs.
as long as they are installed in matched pairs, those pairs may differ in size. ie: a pair of 2 GB modules and a pair of 4 GB modules.
- Maximum installed memory (32 GB) is obtained using 4 GB modules.
- 240 pin DDR2 667 MHz PC2-5300 Fully Buffered DIMM.
- Heatsinks are required to maintain reliable temperature range.
- If the computer is in its original factory configuration with only 2 modules installed, those modules will be in the inner slot of both top and bottom memory riser board. First step to adding more RAM is to take the module from the lower board and install it directly next to the module in the innermost slot on the upper board. All addional modules will be installed in pairs - next installed pair goes into the two inner slots on the lower board. The pair after that in the two outer slots of the top board. Last pair in the outer 2 slots of the lower board.
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 used Parallel ATA optical drives. While you can swap over to SATA optical drives there is no real performace benefit and the cabling for power has to be adapted from the 4 pin conectors to 15 pin SATA power and data cabling has to be routed up from the motherboard to the back of the optical drive bay. Not a particularly difficult modification, but not all that useful as long as Parallel ATA optical drives are still available for the task. The Plextor SuperDrive listed for this model is plug and play requiring no drivers or software to use.
The MacPro1,1 has 4 PCIe revision 1 expansion card slots. These slots are physically 'full length' 16 lane slots, but only the bottom slot, designated Slot 1, is electrically a 16 Lane slot. All others are (** configurable ) 8 lane electrically, 16 lane physical. Slot 1 will by default typically be used for the graphics card since they can benefit the most from the maximum bandwidth.
From the factory the PCIe slots are set with the lowest slot (slot 1) at maximum 16 Lane, called 16X. The next slot up (slot 2) is set to 1 lane (1X) as is Slot 3. Slot 4, the top slot, is configured as an 8 Lane slot (8X). PCIe cards are manufactured in 1 Lane, 4 Lane, 8 Lane and 16 Lane configurations. Most PCIe cards will run in less lanes than they are physically - meaning an 8X card will usually run perfectly, if maybe a little slower, in a slot configured to 4 lanes.
Note: Most 4 port SATA or SAS high performance host and RAID cards are 8X, some are 4X, and in our experience these cards do not run reliably in a 1 lane slot. They will run perfectly with 4 lanes and we recommend that you keep them in a minimum 4 lane slot.
** The PCIe slots on this model MacPro are configurable using the Expansion Slot Utility. This utility can be found in /System/Library/CoreServices. Reconfiguring to optomize performance for the needs of several PCIe cards is a necessary part of setting up or adding cards to your MacPro. Apple has an excellent tech note with more detail on configuring your MacPro using Expansion Slot Utility.