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Green 288-pin DDR4 DIMM with black chips and gold contacts

SK hynix

SK hynix HMAA8GR7CJR4N-XN 64GB DDR4-3200 CL22 ECC Registered server RAM

SKU CH-J8HG-NHN83

64 GB DDR4-3200 registered ECC module with dual-rank CL22 timing for server workloads

  • Total capacity64 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Buffer typeRegistered
  • Memory rank2Rx4
  • Product type288-Pin DDR4 SDRAM
  • 64GB capacity supports dense virtualization workloads
  • DDR4-3200 speed delivers 25600 MT/s data rate
  • CL22 latency optimizes registered timing stability
  • ECC registered design corrects single-bit errors automatically
  • 2Rx4 dual-rank organization maximizes channel density

64GB DDR4-3200 ECC Registered Module

This 64GB DDR4-3200 module delivers registered ECC memory for servers and workstations that require error correction and signal buffering. The dual-rank 2Rx4 organisation increases density within a single 288-pin DIMM slot. It is built for systems qualified for PC4-25600 operation.

DDR4-3200 Speed and Registered Buffer Limit

The module runs at 3200 MT/s with a CAS latency of 22 cycles. Registered buffering adds one clock cycle of address/command delay, which stabilises heavy loads but prevents use in platforms that accept only unbuffered DIMMs. Maximum throughput is bound by the DDR4-3200 interface.

64GB Capacity per DIMM Decides Fit

A single stick provides 64GB, so the total memory ceiling depends on how many registered DIMM slots the motherboard exposes. Boards limited to lower per-slot capacities or unbuffered memory cannot use this module. Verify the platform's qualified vendor list before purchase.

How it compares

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

Price $529.99
Pricier than about 71% 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 $8.28 per GB
Pricier than about 59% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameHynix
Part numberHMAA8GR7CJR4N-XN
Total capacity64 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4

Questions about this item

Should I choose the 64 GB dual-rank module or look for a single-rank alternative?

This module is a 64 GB dual-rank (2Rx4) DDR4-3200 registered DIMM; dual-rank can improve bandwidth on supported platforms but requires a motherboard that accepts registered ECC memory.

What does the DDR4-3200 CL22 rating mean for actual throughput in a server?

The module runs at 3200 MT/s with a CAS latency of 22 cycles, delivering up to 25 600 MB/s theoretical peak bandwidth when the platform operates at the rated speed.

Does the 288-pin registered DDR4 interface limit the maximum speed I can reach?

The 288-pin registered DDR4 form factor supports the rated DDR4-3200 speed; actual operating frequency is determined by the server's memory controller and BIOS configuration.

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