What you're buying: A lot of 4 × 16GB SK Hynix DDR3-1866 ECC Registered (RDIMM) server memory (64GB total). Manufacturer part number HMT42GR7AFR4C-RD, spec 16GB 2Rx4 PC3-14900R-13-12-E2, 1.5V standard voltage. This is the plain Hynix version — same silicon as the Cisco UCS SmartMemory variant, but without the Cisco Security ID sticker. Korea manufacture.

Faster speed grade — DDR3-1866, not 1600. PC3-14900R runs at 1866 MT/s. Compatible with HP ProLiant DL360p / DL380p Gen8, Dell PowerEdge R620/R720/R820, Supermicro X9-series, IBM/Lenovo System x M4, and any other Xeon E5-2600 v1/v2 platform that supports 1.5V DDR3-1866.

Cross-shop note: We also stock the Cisco UCS SmartMemory variant of this SKU (Cisco P/N 15-14068-01) in a separate listing at a slight premium. If you're specifically building or topping up a Cisco UCS chassis, buy the Cisco version. If you just want the fastest DDR3 RDIMM for any other platform, this listing is the better deal.

Condition & testing: Pulled from decommissioned enterprise servers. Visually inspected. Sold as functional pulls; see return policy.

What's included: 4 × SK Hynix 16GB DDR3-1866 ECC RDIMM (HMT42GR7AFR4C-RD).