A-Tech 16GB DDR4 2133MHz ECC UDIMM 2Rx8 840818-001 Server Memory

Server-grade DDR4 ECC UDIMM

This A-Tech module delivers 16GB of DDR4 2133MHz memory with ECC error correction for server and workstation platforms. It operates at the standard 1.20V and carries a CL15 latency rating. The unbuffered design suits systems that require direct memory access without registered buffering. It serves as a compatible replacement for the HP 840818-001 part number.

288-pin DIMM with 2Rx8 organisation

The stick uses the 288-pin DDR4 DIMM form factor and a dual-rank 2Rx8 chip configuration built on major-brand components. Unbuffered ECC circuitry allows the host platform to detect and correct single-bit errors while keeping signal paths short. Standard DDR4 voltage keeps power draw consistent with other DDR4 modules in the same chassis. Physical dimensions follow the DDR4 UDIMM specification so the module seats in any compatible DDR4 UDIMM slot.

DDR4 2133MHz bandwidth ceiling

The PC4-17000 rating caps peak transfer rate at the DDR4 2133MT/s data rate, so workloads that demand higher memory throughput will hit this ceiling. ECC parity bits consume a portion of the bus width, slightly reducing usable bandwidth versus non-ECC equivalents at the same clock. Unbuffered topology limits the maximum number of modules a memory controller can drive compared with registered DIMMs. Systems requiring faster memory speeds or larger per-slot capacities will need a different module class.