Axiom's ddr4 modules use the latest evolutionary dram design, provides improved speed, power management and reliability. The release of ddr4 delivers an overall performance improvement of up to 30% for single dimm configurations. Ddr4 performance scales up to 65% faster in 3-dimm per channel (3dpc) applications over ddr3. SpecificationsCapacity: 8GBDepth: 1GBWidth: x64Voltage: 1.2VPin Count: 288-pinData Rate: 2666MT/sSpeed: PC4-21300Comp Config: 1024Mx8Weight: 0.03 lbs- SKU: SYBA32423