16GB (2 x 8GB) DDR2 800MHz PC2-6400 FBDIMM Certified Memory RAM for Apple Mac Pro 8-CORE / QUAD-CORE 2.8GHZ - 3GHZ- 3.2GHZ INTEL XEON Type: 240-Pin DDR2 FB-DIMM Compatibility: For Apple Mac Pro System Voltage: 1.8V Heat Spreader: Yes Specifications: Apple Certified Heat Spreaders Parts: Lifetime Replacement Warranty