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Green rectangular DDR4 memory module with gold contacts and black chips

SK hynix

SK hynix HMA84GR7AFR4N-VK 32 GB DDR4 2666 ECC RDIMM

SKU CH-J6RX-VJVFP

32 GB DDR4 2666 ECC registered DIMM for Dell PowerEdge R740xd2 and compatible servers

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 32 GB DDR4 2666 capacity handles heavy server workloads
  • ECC registered design detects and corrects memory errors
  • 2 V operation reduces power draw per module
  • 288-pin RDIMM fits Dell PowerEdge R740xd2 and listed systems
  • Dual-rank 2Rx4 organisation increases memory density per slot

32 GB DDR4 ECC RDIMM for Dell PowerEdge R740xd2

This 32 GB DDR4 2666 module is built for Dell PowerEdge R740xd2 servers and compatible Precision workstations. It delivers registered ECC operation at 1.2 V for data integrity in multi-socket platforms.

288-pin registered dual-rank design with CL19 timing

The stick uses a 288-pin RDIMM form factor with 2Rx4 organisation and CL19 latency. Registered buffering reduces electrical load on the memory controller, allowing larger populations per channel in supported Dell and HPE systems.

Verify your platform requires DDR4 RDIMM before

This module cannot be mixed with UDIMM or LRDIMM types in the same server. Confirm the target system lists DDR4 2666 registered ECC memory in its qualified vendor list and that free 288-pin slots are available.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $159.99
Cheaper than about 60% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $5.00 per GB
Cheaper than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameSK hynix inc.
Product lineServer Memory
Model nameHMA84GR7AFR4N-VK & MEM-DR432L-HL01-ER26
Total capacity32 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell SNPTN78YC/32G A9781929 PowerEdge R740xd2

Questions about this item

What speed does the DDR4-2666 interface actually run at in this module?

The module operates at 2666 MT/s, labelled PC4-21300, with a CAS latency of CL19 at 1.2 V.

Will the 288-pin registered DIMM fit my Dell PowerEdge R740xd2 memory slots?

Yes — it is a 288-pin DDR4 RDIMM measuring 133 mm long, 30 mm high and 3 mm thick, matching the R740xd2 slot layout.

What is the correct way to seat this 2Rx4 ECC RDIMM and what step do people often miss?

Align the notch with the slot key, press straight down until both side latches click, and verify the module sits evenly; the common mistake is stopping before the latches engage fully.

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