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Green rectangular circuit board with gold edge connectors and black memory chips, no heat spreader

OWC

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

SKU CH-7R1C-FT0GT

A 64 GB DDR5-5600 ECC registered DIMM validated for Supermicro SuperServer SYS-621C-TN12R, SYS-621H-TN12R, SYS-741GE-TNRT and SYS-751GE-TNRT

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

Capacity 64GB

  • ECC registered design protects data integrity in servers
  • 64 GB single module expands memory capacity efficiently
  • DDR5 5600 speed delivers high bandwidth for workloads
  • 1 V operation reduces power draw per module
  • Validated for Supermicro SuperServer SYS-621C-TN12R and similar systems

64GB DDR5 ECC RDIMM for Supermicro servers

This 64GB DDR5 5600 ECC registered DIMM is built for Supermicro SuperServer models SYS-621C-TN12R, SYS-621H-TN12R, SYS-741GE-TNRT and SYS-751GE-TNRT. It targets administrators upgrading workstation or server platforms that require registered memory with error correction. The module runs at 1.1V with CL46 latency and a 2Rx4 organisation.

ECC registered design changes system behaviour

Registered buffering and ECC allow the memory controller to manage larger capacities and correct single-bit errors, which is essential for server stability. Mixing this module with unbuffered or load-reduced DIMMs is not supported and will prevent the system from posting. The single 64GB stick adds capacity without occupying additional slots.

Verify registered DDR5 support before ordering

Confirm that your SuperServer model is listed above and that the motherboard accepts 288-pin DDR5 registered DIMMs at 5600 MT/s. Systems limited to unbuffered memory or earlier DDR generations will not accept this module. Check the server documentation for maximum per-slot capacity and population rules.

How it compares

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

Price $1,814.99
Pricier than about 67% 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 $28.36 per GB
Pricier than about 80% of the 20,941 comparable items (median $8.19 per GB).

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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 SYS-621C-TN12R
Supermicro SuperServer SYS-621H-TN12R
Supermicro SuperServer SYS-741GE-TNRT
Supermicro SuperServer SYS-751GE-TNRT

Other versions of this model

5 more in the same range

Questions about this item

Will the registered ECC DDR5 module need any firmware updates or periodic replacement after installation?

The module is a JEDEC-standard 288-pin DDR5 5600 CL46 1.1V registered ECC DIMM with no heat spreader; it requires no firmware updates and has no scheduled replacement interval.

What is the first limit reached when the DIMM runs continuously at DDR5 5600 CL46 in a Supermicro SuperServer?

The CAS latency of 46 cycles at 5600 MT/s sets the timing ceiling; sustained throughput is bounded by the registered ECC protocol and the 1.1V operating voltage.

How much heat and power does the 64GB 2Rx4 registered DIMM produce during all-day operation?

At 1.1V the module draws minimal power for a 64GB DDR5 5600 registered ECC part, and with no heat spreader it relies on server chassis airflow for cooling.

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