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Green 288-pin DDR4 RDIMM module with black chips and silver label

SK hynix

SK hynix HMA84GR7AFR4N-VK 32GB DDR4-2666 ECC RDIMM memory upgrade

SKU CH-JD2B-SYHB8 MPN HMA84GR7AFR4N-VK

32GB DDR4-2666 ECC registered RDIMM with CL19 latency and 1.20V operation for HP servers

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 32 GB capacity expands server memory headroom
  • DDR4-2666 speed matches PC4-21300 bandwidth rating
  • ECC registered design protects data integrity under load
  • 20 V operation lowers power draw per module
  • HP 838083-B21 equivalent ensures drop-in compatibility

HP-compatible server upgrade

This 32 GB DDR4-2666 ECC registered DIMM matches HP part 838083-B21 for drop-in capacity expansion. The 288-pin module operates at 1.20 V with CL19 latency and a 2Rx4 organisation. It targets administrators who need validated memory for supported HP platforms. Buyers requiring non-ECC or unbuffered modules for desktop boards cannot use this part.

Thermals and power profile

Registered buffering and 1.20 V operation keep per-module power draw low during typical server workloads. Passive cooling in chassis airflow is sufficient; no active fan on the DIMM itself. The design meets OEM thermal limits for qualified HP systems. Builders using enclosures without directed DIMM airflow should verify platform guidance.

Sustained load behaviour

ECC correction maintains data integrity across extended compute cycles without performance penalty. Registered signalling stabilises the command bus when multiple ranks populate a channel. The module delivers consistent throughput at the rated 2666 MT/s speed under continuous utilisation. Systems needing higher frequencies or lower latencies must select a different specification.

How it compares

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

Price $139.99
Cheaper than about 63% 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 $4.37 per GB
Cheaper than about 82% 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
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 systemsHP

Questions about this item

How do I install the 288-pin DDR4 RDIMM into my HP server, and which step do people get wrong?

Power down the server, open the chassis, align the notch on the 288-pin DDR4 RDIMM with the slot key, press firmly until both ejector clips click. The step people miss is seating both ends evenly so the registered buffer engages correctly.

What maintenance or replacement will the 32GB ECC registered module need later?

No routine maintenance is required for the 32GB ECC registered module. If a correctable error count rises or the module fails, replace it with an identical 2Rx4 DDR4-2666 RDIMM to keep rank balance.

What limit appears first on the 1.20V DDR4-2666 RDIMM under sustained load?

The CAS latency of CL19 at DDR4-2666 sets the timing ceiling; sustained throughput is bounded by the 2666 MT/s data rate and the registered buffer's cycle time.

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