HP 32GB DDR3-1866 4Rx4 ECC LRDIMM Part Number: 708643-B21 Product Type: RAM Memory Capacity: 32 GB Type: DRAM Memory Module Technology: DDR3 SDRAM Form Factor: LRDIMM 240-pin Speed: 1866 MHz (PC3-14900L) Latency Timings: CL13 Data Integrity Check: ECC Signal Processing: Registered Features: Quad Rank, Load Reduced Chips Organization: X4 Supply Voltage: 1.50 V