16GB Kit (4x4GB) Fully Buffered Memory Ram for APPLE MAC PRO SERVERS and WORKSTATIONS. Apple Mac Pro 8-core AND Apple Mac Pro Quad-core 2.0 GHz or 2.66GHz or 3.0GHz (Intel Xeon) Workstations (MA356LL/A A1186) PC2-5300 DDR2 ECC FB DIMM Fully Buffered Server Memory