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Green 288-pin DDR5 RDIMM module with black memory chips and gold contacts

SK hynix

SK hynix 64GB DDR5-4800 ECC Registered CL40 Dual Rank 288-Pin RDIMM HMCG94MEBRA109N

SKU CH-ABTY-RWDKE

64 GB DDR5-4800 registered ECC RDIMM with CL40 latency and dual-rank organisation for high-capacity server workloads

  • Total capacity64 GB
  • CAS latencyCL40
  • Buffer typeRegistered
  • Product type288-Pin DDR5 RDIMM
  • 64 GB capacity supports large server workloads
  • DDR5-4800 speed delivers high memory bandwidth
  • CL40 latency enables responsive data access
  • ECC registered design protects data integrity
  • Dual rank 288-pin RDIMM fits standard server slots

64 GB DDR5-4800 Registered ECC Module

This SK hynix RDIMM provides 64 GB of DDR5 memory rated at 4800 MT/s with CL40 latency. It is a dual-rank, registered module with ECC and load-reduced signalling for stable operation in multi-module configurations. The 288-pin form factor fits standard DDR5 server slots.

Suited for servers needing maximum capacity per slot

The dual-rank 64 GB density helps reach high total memory without filling every channel. It is not for consumer desktops or workstations that only accept unbuffered UDIMMs. Systems requiring single-rank modules for specific timing rules should look elsewhere.

Verify DDR5 RDIMM support and slot count

Confirm the motherboard and CPU memory controller accept registered DDR5 ECC LRDIMMs at 4800 MT/s. Check how many 288-pin slots are free and whether the platform limits total capacity or rank count per channel. Match the module voltage and thermal profile to the system design.

How it compares

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

Price $2,083.99
Pricier than about 87% 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 $32.56 per GB
Pricier than about 90% 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 nameHynix
Part numberHMCG94MEBRA109N
Total capacity64 GB
Product type288-Pin DDR5 RDIMM
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered

Questions about this item

Does my server motherboard need DDR5 RDIMM slots to use this 64GB module?

Yes, this module uses the 288-pin DDR5 RDIMM form factor and requires a motherboard with DDR5 RDIMM slots.

Can I mix this dual-rank ECC registered module with single-rank RDIMMs already in my system?

Mixing ranks is possible if the motherboard supports it, but population rules vary by platform; check the board manual for supported rank combinations.

How do I verify the CL40 timing and 4800 MT/s speed are active after installation?

Enter the system BIOS or use a tool like CPU-Z to confirm the memory reports DDR5-4800 with CL40 latency.

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