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Green rectangular DDR5 RDIMM module with black chips and gold contacts, no heat spreader

OWC

OWC 64GB DDR5 5600 CL46 ECC Registered RDIMM 2Rx4 1.1V 288-pin memory upgrade

SKU CH-E3E4-19RHD

64 GB DDR5 5600 CL46 ECC registered RDIMM for Supermicro SuperServer workstations and servers

  • Total capacity64 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latency46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB

  • 64 GB single-module capacity for high-density server configurations
  • DDR5 5600 speed with CL46 latency for responsive data handling
  • ECC registered design detects and corrects memory errors
  • 1 V operation reduces power draw in multi-DIMM systems
  • Validated for Supermicro SuperServer SSG-121E-NE316R and four other models

Server-grade DDR5 ECC RDIMM

This 64GB DDR5 5600 CL46 module is a registered ECC RDIMM built for compatible Supermicro SuperServer platforms. It targets administrators upgrading workstations, NAS systems, servers or network switches that require registered memory with error correction.

Registered memory cannot mix

The DDR5 5600 PC5-44800 standard used here requires all installed DIMMs to be registered ECC; mixing registered with unbuffered or load-reduced modules will prevent the system from operating. JEDEC compliance ensures electrical and timing conformity at 1.1V, but the registered buffer adds one clock cycle of latency compared with unbuffered designs.

Verify your SuperServer model

Confirm the exact model — SSG-121E-NE316R, SSG-121E-NES24R, SSG-221E-NE324R, SYS-111C-NR or SYS-111E-FDWTR — and check the platform’s maximum supported capacity per slot and total channel population limits before ordering.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $1,681.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
CAS latency 46
Higher than about 90% of the 483 comparable items (median 22).
Price per GB $26.28 per GB
Pricier than about 72% of the 20,941 comparable items (median $8.19 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 nameOWC
Part number5R6D52R464 GB
Total capacity64 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latency46
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro SuperServer SSG-121E-NE316R
Supermicro SuperServer SSG-121E-NES24R
Supermicro SuperServer SSG-221E-NE324R
Supermicro SuperServer SYS-111C-NR
Supermicro SuperServer SYS-111E-FDWTR

Other versions of this model

5 more in the same range

Questions about this item

Should I pick the single 64GB module or combine smaller DIMMs to reach the same capacity?

The listing is a single 64GB DDR5 5600 CL46 ECC Registered RDIMM. If your Supermicro server has free 288-pin slots you can add one module; otherwise match the existing rank and voltage configuration when mixing capacities.

What does the 5600 MT/s rating deliver inside a Supermicro SuperServer?

At 5600 MT/s the module runs at the JEDEC-standard DDR5-5600 data rate with CL46 latency and 1.1 V, giving the rated PC5-44800 bandwidth when the platform memory controller is set to that speed.

How does the DDR5 ECC Registered RDIMM interface limit real-world throughput?

The 288-pin registered DIMM presents a 64-bit data bus plus ECC at DDR5-5600, so peak throughput is capped at the PC5-44800 specification; the register adds one cycle of command latency but enables the large 64GB 2Rx4 capacity per slot.

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