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Four green DDR4 registered DIMMs with black chips

SK hynix

SK hynix HMA81GR7AFR8N-UH 32GB (4x8GB) DDR4-2400 Registered Server RAM

SKU CH-10TH-F1B99 MPN HMA81GR7AFR8N-UH

Four 8 GB DDR4-2400 registered modules totalling 32 GB for server workloads

  • Total capacity32 GB (4 × 8 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank1Rx8
  • 32 GB total capacity from four 8 GB modules
  • Registered DDR4-2400 speed for stable server operation
  • 20 V low-voltage design reduces power draw
  • 288-pin DDR4 form factor fits standard server slots
  • CL17 latency at PC4-19200 bandwidth

32GB DDR4-2400 Registered Kit

This SK hynix kit provides 32 GB of DDR4 memory in four 8 GB modules. The registered design helps stabilise the signal on platforms that require buffered DIMMs. Speed is rated at DDR4-2400 with a CAS latency of 17. Modules operate at 1.20 V and use the standard 288-pin form factor.

Servers needing registered non-ECC memory

Systems that require registered DIMMs without error correction will match this specification. Workstations or consumer boards that accept only unbuffered memory cannot use these modules. Buyers who need ECC protection should select a different kit.

Registered DDR4-2400 at CL17

The registered buffer and CL17 timing at DDR4-2400 define compatibility with qualified server platforms. Verify that the target system supports registered non-ECC DIMMs at this speed before purchase.

How it compares

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

Price $230.99
Pricier than about 54% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB (4 × 8 GB)
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $7.22 per GB
Typical for this category: the median of 6,064 items is $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
Product lineServer Memory
Model nameHMA81GR7AFR8N-UH
Total capacity32 GB (4 × 8 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportNo
Buffer typeRegistered
Memory rank1Rx8
Power
Rated voltage1.2 V

Questions about this item

How much power do four 1.20 V registered modules draw under full load?

Each module operates at 1.20 V; total power depends on the server platform and workload, so consult your system documentation for exact draw.

What motherboard feature is required to use these registered DIMMs?

The motherboard must support registered DDR4 memory; unbuffered consumer boards will not accept these modules.

Can the CL17 2400 MT/s sticks share channels with slower DDR4 modules already installed?

The memory controller will run all populated channels at the speed of the slowest module, so mixing speeds reduces overall bandwidth.

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