8GB (4X 2GB) DDR2 667MHz FBDIMM Memory RAM for APPLE MAC PRO 2006-2007 Dual-Core 2.0GHz/2.66GHz/3.0GHz & Quad-Core 3.0GHz Type: 240-Pin DDR2 SDRAM Compatibility: For Apple Mac Pro System Voltage: 1.8V Heat Spreader: Yes Parts: Lifetime Replacement Warranty