32GB RDIMM SRX4 3200 16GBCisco 32GB DDR4 SDRAM Memory Module 32 GB (1 x 32GB) DDR4 3200 PC4 25600 DDR4 SDRAM 3200 MHz Single rank Memory 1. 20 V ECC Registered 288 pin DIMM VPN: UCSX MR X32G1RW= SKU: RSC748210 UPC: 32 GB of memory to maintain symmetry with processor and hard drive and bring out the ultimate computing experience 3200 MHz memory speed with Registered signal for great multitasking capability DDR4 3200 PC4 25600 interface synchronizes electrical and clock signals