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Green circuit board DDR4 memory module with black chips and gold contacts

A-Tech

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

SKU CH-GFGT-5DRK8

16 GB DDR4 2133 ECC unbuffered DIMM with 2Rx8 organisation and CL15 latency for HP-compatible servers

  • Capacity16GB
  • SpeedDDR4 2133 (PC4 17000)
  • CAS LatencyCL15
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • 16 GB capacity handles larger server workloads
  • ECC UDIMM detects and corrects data errors
  • DDR4 2133 MHz speed with CL15 latency
  • 2 V standard voltage reduces power draw
  • Compatible with HP part numbers 797259-091 805671-B21 805671-S21 819801-001 M0S34A N0H88AA

16GB DDR4 ECC UDIMM for HP servers

This 16GB DDR4 2133 ECC UDIMM module uses a 2Rx8 layout and runs at 1.20V with CL15 latency. It is built for HP server and workstation systems that require error-correcting unbuffered memory. The single DIMM delivers 16GB capacity in a standard 288-pin form factor.

Straightforward DIMM installation

Installation follows the normal 288-pin DIMM procedure: align the notch, press firmly until the retention clips engage. The main risk is purchasing without confirming the exact HP part numbers listed — 797259-091, 805671-B21, 805671-S21, 819801-001, M0S34A, N0H88AA — because servers often restrict qualified modules per slot or per channel.

DDR4 2133 bandwidth and unbuffered signal limits

The PC4-17000 rating sets peak throughput at the DDR4 2133 data rate, which caps memory bandwidth for workloads that scale with speed. Unbuffered ECC topology also limits the number of ranks the memory controller can address per channel, so maximum system capacity may be lower than with registered DIMMs.

Highlights

  • 16 GB capacity handles larger server workloads
  • ECC UDIMM detects and corrects data errors
  • DDR4 2133 MHz speed with CL15 latency
  • 2 V standard voltage reduces power draw
  • Compatible with HP part numbers 797259-091 805671-B21 805671-S21 819801-001 M0S34A N0H88AA

Specifications

BrandA-Tech
Capacity16GB
SpeedDDR4 2133 (PC4 17000)
CAS LatencyCL15
Voltage1.20V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
FeaturesMajor Brand Chips

Questions about this item

How can I confirm the 16GB DDR4 2133 ECC UDIMM is running at the correct speed after installation?

Enter the system BIOS or use a utility such as CPU‑Z; the memory should report DDR4‑2133 (PC4‑17000) at CL15 with 1.20 V.

What ships with the module and what must I source separately?

The box contains one 16GB 288‑pin DDR4 ECC UDIMM (2Rx8); no cables, brackets or additional parts are included.

My server lists HP part numbers 805671‑B21 and 797259‑091 — which capacity should I choose?

Both part numbers correspond to a single 16GB DDR4‑2133 ECC UDIMM, so select the 16GB module listed here.

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