We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green 288-pin DDR4 RDIMM module with black chips

A-Tech

A-Tech 4GB DDR4 2133 ECC RDIMM 1Rx8 Server Memory

SKU CH-S9TP-Y167A

A 4 GB DDR4 2133 ECC registered DIMM with CL15 latency and 1.2 V operation for server upgrades

  • Total capacity4 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • ECC protection guards data integrity in critical workloads
  • DDR4 2133 MHz speed with CL15 latency
  • Registered DIMM design stabilises signal on 288-pin server boards
  • 2 V operation matches standard DDR4 voltage
  • Direct replacement for Hynix 451-series modules

4GB DDR4 2133 ECC RDIMM for servers

This 4GB DDR4 2133 ECC registered DIMM is built for server and workstation platforms that require error-correcting memory. The module uses major-brand chips and runs at the standard 1.2V DDR4 voltage. It suits administrators upgrading or repairing compatible systems with a single 4GB stick.

Check DDR4 RDIMM support and slot count

Verify that your motherboard accepts DDR4 registered ECC DIMMs and has a free 288-pin slot before ordering. The module operates at CL15 latency and PC4-17000 speed, so the platform must support this data rate. Confirm the maximum capacity per slot and total system limit in your hardware documentation.

Replaces specific Hynix part numbers

The module is a compatible equivalent for Hynix HMA451R7AFR8N-TF, HMA451R7AFR8N-TFT1 and HMA451R7MFR8N-TF, simplifying sourcing for those exact part numbers. No extra accessories or software are bundled with the memory stick.

How it compares

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

Price $18.99
Cheaper than about 95% 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 $4.75 per GB
Cheaper than about 75% 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 capacity4 GB
Performance
Rated speedDDR4 2133 (PC4 17000)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Power
Rated voltage1.2 V

Questions about this item

What is included with the A-Tech 4GB DDR4 2133 ECC RDIMM module and is anything else required for installation?

The package contains one 4GB DDR4 2133MHz PC4-17000 ECC Registered DIMM with 288 pins and CL15 latency. No additional components are needed; the module installs directly into a compatible server or workstation memory slot.

Should I choose this 4GB 1Rx8 CL15 module or a different capacity or rank for my server?

Select this 4GB 1Rx8 CL15 module when your system requires a single-rank registered ECC DIMM at 2133MHz. If your platform supports higher densities per slot or needs multiple ranks per channel for maximum bandwidth, a larger capacity or dual-rank module would be appropriate instead.

What does the 2133MHz PC4-17000 rating mean for real-world server performance?

The 2133MHz PC4-17000 rating indicates a maximum data transfer rate of 17 GB/s per module at CL15 latency and 1.2V. In a real machine, actual throughput depends on the memory controller, channel population, and workload, but the module will operate at its rated speed when the platform supports DDR4-2133.

More in ECC Server RAM

Similar items