Mushkin Enhanced 8GB (2 x 4GB) DDR2 800 (PC2 6400) ECC Fully Buffered Dual Channel Kit Memory For Apple Mac Pro Model 976609A Type: 240-Pin DDR2 FB-DIMM Compatibility: For Apple Mac Pro System Cas Latency: 5 Timing: 5-5-5-18 Voltage: 1.8V Multi-channel Kit: Dual Channel kit Heat Spreader: Yes Parts: Lifetime limited