iMac G5 (iSight) comes with a 512 MB DDR2 SDRAM module built into the logic board that can't be removed or replaced. It also has one additional RAM slot that can support up to 2 GB of memory (you can install a 512 MB, 1 GB, or 2 GB module in this slot). You must use a memory module (DIMM) that meets all of these criteria:
- PC2-4200
- unbuffered
- nonparity
- 240-pin
- 533 MHz
- DDR2 SDRAM
DIMMs that have any of the following features are not supported in the iMac G5 (iSight):
- registered or buffered
- PLLs
- ECC
- parity
- EDO RAM
If you use System Profiler (find it in /Applications/Utilities) to view the memory, the DIMM slots for the iMac G5 (iSight) are identified as follows:
When upgrading memory, always follow the installation instructions exactly as written. Never attempt to remove screws that are not listed in the instructions.
For more information about upgrading your iMac G5 (iSight) memory, see "iMac G5 (iSight): Installing and replacing memory (RAM)."