2GB Apple PowerMac G5 (Late 2005), iMac G5 Memory Upgrade (MA240G/A) DDR2 PC2-4200 DIMM. Please confirm that you are buying the correct RAM. There are different types of memory for the PowerMac G5s.
2GB DDR2-533 (PC2-4200) 256x64 CL4 1.8v 240 Pin Non-ECC DIMM For Apple 1.9GHz 17-inch iMac G5 (MA063L/A), 2.1GHz 20-inch iMac (MA064LL/A), Power Mac G5 A1117, Power Mac G5 Dual-Core 2GHz DDR2 (M9590LL/A), Power Mac G5 Dual-Core 2.3GHz DDR2 (M9591LL/A), Power Mac G5 Quad 2.5GHz DDR2 (M9592LL/A). Please confirm that you are buying the correct RAM. There are different types of memory for the PowerMac G5s.