Apple Mac Pro (Mid 2010) - Manual (Page 43)

43 Chapter 3 Making a Good Thing Better
Installing Memory
Your Mac Pro comes with a minimum of 3 GB of memory in the single-processor
model, or a minimum of 6 GB of memory in the dual-processor model, installed as
1 GB unbuffered ECC dual inline memory modules (UDIMMs).
All installed UDIMMs must meet these specifications:
 PC3-10600E, 1333 MHz, DDR3 SDRAM UDIMMs
 Error-correcting code (ECC)
 72-bit wide, 240-pin ECC modules
 36 ICs maximum per ECC UDIMM
NOTICE: Apple recommends that you use Apple-approved DIMMs. DIMMs from older
Mac computers cannot be used in your Mac Pro. You can purchase Apple-branded
memory online from the Apple Store at www.apple.com/store.
When purchasing DIMMs for use in Mac computers, make sure that the memory vendor
conforms to the Joint Electron Device Engineering Council (JEDEC) specification. Check
with your memory vendor to ensure that the DIMMs support the correct timing modes
and that the Serial Presence Detect (SPD) feature has been programmed properly, as
described in the JEDEC specification.
Note: Although the memory speed of the UDIMMS is 1333 MHz, they will operate at
1066 MHz or 1333 MHz depending on the processor in the computer.