Kingston Apple 8GB Kit (2x4GB Modules) 667MHz DDR2 FBDIMM Desktop Memory for Apple MacPro Workstation (KTA-MP667AK2/8G) 8GB kit including two 4GB 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