iMac G5, iMac G5 (Ambient Light Sensor): Memory specifications
Summary
Learn what kinds of memory you can use with your iMac G5 or iMac G5 (Ambient Light Sensor).
Products Affected
iMac G5 (20-Inch), iMac G5 (17-Inch), iMac G5 ALS (17-Inch), iMac G5 ALS (20-Inch)
iMac G5 computers work with memory modules (DIMMs) that meet all of these criteria: PC3200, unbuffered, nonparity, 184-pin, 400Mhz DDR SDRAM.
There are two RAM slots. The maximum amount of RAM you can install is 2 GB. You can use RAM module sizes of 256 MB, 512 MB and 1 GB, in either slot.
DIMMs with any of the following features are not supported in the iMac G5 computer: registers or buffers, PLLs, ECC, parity, or EDO RAM.
When looking at memory in the Apple System Profiler, the DIMM slots are identified as followed:
- J4000 - Inside slot (near processor cover)
- J4001 - Outside slot (near bezel)
If you get a new iMac G5 that has one DIMM installed, the 17-inch model usually has the memory in the inside slot and the 20-inch model usually has the memory installed in the outside slot.
Always follow the upgrade instructions for Memory and AirPort Extreme card installation as written. Never attempt to remove screws that are not listed in the upgrade instructions.
Additional Information
For more information about upgrading your iMac G5's memory, see "iMac G5: Benefit of using matching memory modules (RAM)".