Apple M9032LL User Guide - Page 51

Installing Memory, PC2-4200, 533 MHz, Double-Data-Rate 2 DDR2 DIMMs, also known as DDR2-533

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Installing Memory Your Power Mac G5 has eight memory slots (in two banks of four each). You can install additional synchronous dynamic random-access memory (SDRAM) in packages called dual inline memory modules (DIMMs) in the memory slots. Your computer comes with a minimum of 512 MB of random access memory (RAM), installed as a pair of 256 MB DIMMs in two of the DIMM slots. You can install additional pairs of DIMMs in the open DIMM slots. DIMMs must be installed in equal-sized pairs and fit these specifications:  PC2-4200, 533 MHz, Double-Data-Rate 2 (DDR2) DIMMs, also known as DDR2-533  64-bit wide, 240-pin modules  18 memory devices maximum per DIMM  Conform to JEDEC specification (see note below)  Nonparity  Error-correcting code (ECC) or no error-correcting code (NECC) modules. Do not mix ECC and NECC memory modules within a pair.  Unbuffered (not registered or buffered)  Maximum height of 1.25 inches Important: DIMMs from older Macintosh computers are not compatible with and do not fit in your Power Mac G5. Note: When purchasing DIMMs for use in Macintosh 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. To check the compatibility of your DIMMs, see the Macintosh Products Guide on Apple's website at www.apple.com/guide. You can purchase Apple-branded memory online from the Apple Store at www.apple.com/store. Chapter 4 Working Inside Your Computer 51

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Chapter 4
Working Inside Your Computer
51
Installing Memory
Your Power Mac G5 has eight memory slots (in two banks of four each). You can install
additional synchronous dynamic random-access memory (SDRAM) in packages called
dual inline memory modules (DIMMs) in the memory slots. Your computer comes with
a minimum of 512 MB of random access memory (RAM), installed as a pair of 256 MB
DIMMs in two of the DIMM slots. You can install additional pairs of DIMMs in the open
DIMM slots.
DIMMs must be installed in equal-sized pairs and fit these specifications:
Â
PC2-4200, 533 MHz, Double-Data-Rate 2 (DDR2) DIMMs, also known as DDR2-533
Â
64-bit wide, 240-pin modules
Â
18 memory devices maximum per DIMM
Â
Conform to JEDEC specification (see note below)
Â
Nonparity
Â
Error-correcting code (ECC) or no error-correcting code (NECC) modules. Do not mix
ECC and NECC memory modules within a pair.
Â
Unbuffered (not registered or buffered)
Â
Maximum height of 1.25 inches
Important:
DIMMs from older Macintosh computers are not compatible with and do
not fit in your Power Mac G5.
Note:
When purchasing DIMMs for use in Macintosh 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. To check the
compatibility of your DIMMs, see the Macintosh Products Guide on Apple’s website at
www.apple.com/guide. You can purchase Apple-branded memory online from the
Apple Store at www.apple.com/store.