Kingston Apple 2GB Kit (2x1GB Modules) 667MHz DDR2 FBDIMM Desktop Memory for Apple MacPro Workstation (KTA-MP667AK2/2G) 2GB kit including two 1GB modules of 667MHz DDR2 Memory Specifically designed and tested for compatibility 240-pin fully buffered FBDIMM From the industry leader in PC memory Backed by a lifetime warranty and free technical support