Below is a full list of Mac machines compatible with iRam Part # IR4GMPK.

Mac Pro DDR2 667MHz 3.0GHz 8-Core Xeon

Mac Pro DDR2 667MHz 3.0GHz Quad-Core Xeon

Mac Pro DDR2 667MHz 2.66GHz Quad-Core Xeon

Mac Pro DDR2 667MHz 2.0GHz Quad-Core Xeon