256MB PC-2700 184pin DIMM internal memory module for the Apple computer systems shown in the table below. This unit is backwardly compatible with PC-2100 memory i.e. it will work in any system capable of running PC-2100 memory.
This is a used & tested part taken from a recycled Apple laptop.

Compatibility table
eMac	1.25GHz and 1.42GHz models only
PowerMac G5	1.6GHz model only
PowerMac G4	Mirror door models only (Dual 867MHz, 1GHz, Dual 1GHz, Dual 1.25GHz & Dual 1.42GHz
Xserve G4	1GHz, Dual 1GHz, 1.33GHz & Dual 1.33GHz

Image shown is a generic memory DIMM, not specifically this model."