[Pre Order - allow extra time] OWC 64GB Capacity, 2933 MHz Clock Speed, PC4-23400, 288-Pin R-DIMM, Low Noise 8-Layer PCB, Voltage: 1.2V, 21-21-21-32 Timings, ECC Error Correction, Registered, 8192M x 72 Chip Architecture, RoHS Compliant