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Two green DDR4 server DIMMs with black heat spreaders and gold contacts

SK hynix

SK hynix HMAA4GS7CJR8N-XN 64GB (2x32GB) DDR4-3200 ECC Registered 2Rx8 server RAM

SKU CH-212V-5P2CH MPN HMAA4GS7CJR8N-XN

A 64 GB dual-channel kit of registered ECC DDR4-3200 server memory with CL22 latency and 1.20 V operation

  • Capacity64GB (2 x 32GB)
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.20V
  • ECCYes
  • 64 GB total capacity across two 32 GB modules
  • ECC registered design detects and corrects single-bit errors
  • DDR4-3200 speed rated at PC4-25600 bandwidth
  • Low 1.20 V operation reduces server power draw
  • 288-pin 2Rx8 layout fits standard registered DIMM slots

Server memory kit for ECC platforms

This kit supplies 64 GB of DDR4 memory across two 32 GB modules. It is built for servers and workstations that require registered, error-correcting DIMMs. Systems without registered-memory support cannot use these modules.

Registered DDR4-3200 with CL22 latency

The modules run at 3200 MT/s (PC4-25600) with a CAS latency of 22 at 1.20 V. Registered buffering adds one clock cycle of address-command delay, so the memory controller must support registered DIMMs. Mixed populations with unbuffered DIMMs are not supported by the platform.

2Rx8 organisation per 32 GB module

Each DIMM uses a dual-rank 2Rx8 layout, placing two ranks on the 288-pin module. The rank count determines how many logical ranks the memory controller sees per channel; platforms with a low rank limit per channel may not accept a full population of these modules.

商品特色

  • 64 GB total capacity across two 32 GB modules
  • ECC registered design detects and corrects single-bit errors
  • DDR4-3200 speed rated at PC4-25600 bandwidth
  • Low 1.20 V operation reduces server power draw
  • 288-pin 2Rx8 layout fits standard registered DIMM slots

商品規格

BrandHynix
SeriesServer Memory
ModelHMAA4GS7CJR8N-XN
Capacity64GB (2 x 32GB)
Type288-Pin DDR4 SDRAM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8

商品問答

Should I pick the 2x32GB kit or buy single 32GB modules to reach 64GB?

The kit supplies two matched 32GB modules for a total of 64GB, ensuring identical timings and rank layout across both slots.

What does the PC4-25600 rating deliver inside a server?

It runs at DDR4-3200 with CL22 latency at 1.20V, providing 25600 MB/s peak bandwidth per module when the platform supports that speed.

How does the 288-pin DDR4 registered ECC interface limit real-world use?

The registered 2Rx8 design requires a server chipset that supports ECC RDIMMs; desktop boards will not post with these modules.

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