Product Specs: OWC Apple Qualified For the Mac Pro 8-core /
Quad-core Xeon Size: 4GB (4096MB) per module
Technology: DDR2
ECC Pin Count: 240-pin FB-DIMM 512M x 72, Dual Rank ECC Module CAS 5-5-5 TRUE PC6400 DDR2 Major Thermal Tested Module Bandwidth: 6.4GB /s Fully compliant with all Apple Mac Pro
Specifications Data Rate: 800MHz
Speed: PC6400
Voltage: 1.8V Fully compliant with JEDEC specifications RoHS Certified