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Green 288-pin DDR4 UDIMM module with black chips

A-Tech

A-Tech 4GB DDR4 2133 ECC UDIMM 1Rx8 HP 797257-081 805667-B21 819799-001 N0H86AA server RAM

SKU CH-BXR5-XCA5X

4GB DDR4 2133 ECC UDIMM 1Rx8 module for HP servers, 288-pin DIMM at 1.2V CL15

  • Total capacity4 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 4GB capacity expands server memory headroom
  • DDR4 2133 speed matches PC4-17000 spec
  • ECC UDIMM protects data integrity in critical workloads
  • 1Rx8 single-rank layout suits dense configurations
  • 2V standard voltage keeps power draw low

Capacity and Compatibility

This 4GB DDR4 module operates at 2133MHz with CL15 latency and 1.20V standard voltage. It uses ECC UDIMM unbuffered architecture with a 1Rx8 rank configuration and 288-pin form factor. The module serves as a direct replacement for HP part numbers 797257-081, 805667-B21, 819799-001, and N0H86AA in compatible server and workstation systems.

Thermals and Power Efficiency

Standard DDR4 voltage of 1.20V keeps power draw low during typical server workloads. Unbuffered design eliminates register overhead, reducing heat generation compared to registered alternatives. The single-rank 1Rx8 organisation contributes to efficient thermal performance under sustained memory operations in multi-module configurations.

Upgrade Context and Limitations

This module upgrades systems currently running lower-capacity DDR4 ECC UDIMM memory or replaces failed modules in HP server platforms. The 4GB capacity suits basic virtualisation hosts, file servers, and entry-level workstations. Buyers needing higher density per slot or registered DIMM support for larger memory arrays should verify platform requirements before purchasing.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $32.99
Cheaper than about 89% of the 6,523 comparable items (median $188.99).
Total capacity 4 GB
Lower than about 95% of the 6,064 comparable items (median 32 GB).
Price per GB $8.25 per GB
Pricier than about 59% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Total capacity4 GB
Performance
Rated speedDDR4 2133 (PC4 17000)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL15
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Power
Rated voltage1.2 V

Questions about this item

How do I install this 288-pin DDR4 ECC UDIMM and what step is often missed?

Align the notch on the module with the slot key, press firmly until both side clips click shut, then confirm the system detects the full 4 GB at 2133 MHz in BIOS.

What maintenance or replacement will this 1.20 V DDR4 module need over time?

No scheduled maintenance is required; if errors appear, run a memory test and replace the module if it fails.

What limit appears first when this CL15 1Rx8 module runs under sustained load?

The 2133 MHz speed and CL15 latency set the throughput ceiling before voltage or thermal limits are reached.

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