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Green PCB DDR4 288-pin DIMM with black chips and silver contacts

A-Tech

A-Tech 16GB DDR4 2133 ECC RDIMM 2Rx4 Server Memory

SKU CH-M9A4-PCBNR

16GB DDR4 2133 ECC registered server DIMM with 2Rx4 organisation and 1.2V operation

  • Total capacity16 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 16 GB capacity expands server memory headroom for larger workloads
  • ECC registered design detects and corrects single-bit errors to protect data integrity
  • DDR4 2133 MHz speed delivers 17000 MB/s bandwidth for responsive performance
  • 288-pin RDIMM form factor fits standard DDR4 server DIMM slots
  • 2 V operation reduces power draw compared with earlier DDR generations

Capacity and fit

This is a single 16GB DDR4 registered DIMM built for servers and workstations that require ECC error correction. The module runs at 2133MHz with CL15 latency at the standard 1.20V. Its 2Rx4 organisation and 288-pin form factor target multi-socket platforms where data integrity and sustained throughput matter more than low latency.

Replacement scope

The stick replaces the HP part numbers 784672-001, 726719-S21, 753221-B21, 753223-B21, 807818-B21, 810745-B21, 753221-S21, J9P83AT, 726720-S21 and 752369-081. The upgrade is worthwhile when your chassis has free DIMM slots and the firmware supports registered ECC modules at this speed rank configuration. It will not fit systems that accept only unbuffered non-ECC UDIMMs or that are limited to lower-density ranks.

Pre-purchase checks

Verify that your motherboard or server manual lists DDR4 2133 registered ECC DIMMs with a 2Rx4 layout on the qualified vendor list. Confirm the maximum supported capacity per slot and the total number of populated channels allowed by the CPU. Ensure the BIOS revision in use recognises the module part number; a mismatch can prevent the system from posting or force a lower speed.

How it compares

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

Price $56.99
Cheaper than about 82% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $3.56 per GB
Cheaper than about 85% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Total capacity16 GB
Performance
Rated speedDDR4 2133 (PC4 17000)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Power
Rated voltage1.2 V

Questions about this item

Will this 288-pin DDR4 RDIMM fit my server's DIMM slots?

This module uses the standard 288-pin DDR4 DIMM form factor, so it fits any server or workstation slot designed for DDR4 RDIMMs.

What is the correct way to seat this registered ECC module, and what step do installers often miss?

Align the notch with the slot key, press firmly until both side latches click, then verify in BIOS that the 16 GB 2Rx4 module is detected at 2133 MHz with ECC active.

Does this 1.20 V CL15 module require any periodic maintenance or scheduled replacement?

No scheduled maintenance is needed; the module is validated for continuous server operation and is covered by a lifetime warranty.

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