HPE 16GB 2Rx8 DDR4-2666 CAS-19 RDIMM SmartMemory Kit

HPE sells its server memory as SmartMemory kits, and the 835955-B21 is a 16GB module in that program. It is a registered DIMM with ECC, a 2Rx8 layout, a 2666 MT/s data rate and a CAS latency of 19.

CAS latency is the delay, counted in clock cycles, between a read request and the first data. For a buyer the practical point is consistency: all modules in a server should share speed and latency settings, so a replacement for a failed DIMM should match what is already fitted.

The number 835955-X21 is listed as an option part number for this memory. HPE uses suffix variants like this for different packaging or sales programs, so it helps when you see the alternative in a quote or on a label.

Typical orders extend memory in a ProLiant server or replace a faulty DIMM. Confirm the server model's memory population rules before ordering.

Available new, refurbished and used. New and refurbished carry a choice of 1 year or 3 years of warranty; used carries 90 days. Add 835955-B21 to an RFQ and give us the count you need for a price.