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Green rectangular DDR5 server memory module with black chips and gold contacts

SK hynix

SK hynix HMCG94AGBRA181N 64GB DDR5-5600 ECC Reg Dual Rank server RAM

SKU CH-139T-YAY6G

64 GB DDR5-5600 registered ECC dual-rank module with CL46 latency and 1.1 V operation for servers and workstations

  • Total capacity64 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Buffer typeRegistered
  • Product type288-Pin DDR5 SDRAM
  • 64 GB capacity supports memory-intensive server workloads
  • DDR5-5600 speed delivers high data throughput for demanding applications
  • ECC Registered design detects and corrects errors to protect data integrity
  • Dual Rank organisation increases memory density per module slot
  • 1 V operation reduces power consumption in dense configurations

64GB DDR5-5600 ECC Registered DIMM

This SK hynix module provides 64GB of DDR5 SDRAM in a 288-pin registered form factor. It operates at 5600 MT/s with a CAS latency of CL46 and a voltage of 1.1V. The dual-rank design includes error-correcting code for data integrity in critical workloads.

For Servers and Workstations Requiring Registered

This memory suits systems that mandate registered ECC DDR5 modules at the 5600 speed grade. It is not for desktop boards that accept only unbuffered non-ECC DIMMs. Buyers needing lower latency timings or different voltage specifications should verify platform requirements before purchase.

Dual Rank 64GB Density Decides Fit

The single specification that determines compatibility is the 64GB dual-rank organisation combined with registered ECC DDR5 at 5600 MT/s. Your motherboard and CPU memory controller must explicitly support this exact density, rank structure and registered signalling.

How it compares

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

Price $2,337.99
Pricier than about 89% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $36.53 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameHynix
Part numberHMCG94AGBRA181N
Total capacity64 GB
Product type288-Pin DDR5 SDRAM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered

Questions about this item

Does the 288-pin DDR5 form factor fit standard server DIMM slots?

Yes, the 288-pin DDR5 design matches the standard registered DIMM slot used in compatible server and workstation platforms.

What is the correct seating procedure for the registered ECC module?

Align the module notch with the slot key, press firmly until both locking tabs click, and verify the registered buffer engages before applying power.

When should the 64GB dual-rank module be replaced?

Replace the module if system diagnostics report uncorrectable ECC errors, persistent memory test failures, or the hardware enters a degraded memory state.

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