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OWC

OWC 5R6D54R4128G 128GB DDR5 5600 CL46 4Rx4 1.1V ECC RDIMM memory upgrade

SKU CH-900C-VMPBP

A 128GB DDR5 5600 ECC registered RDIMM with CL46 latency and 1.1V operation for compatible Supermicro SuperServer systems

  • Total capacity128 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latency46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 128GB

  • ECC registered design protects data integrity in servers
  • 128GB single module maximises capacity per DIMM slot
  • DDR5 5600 speed delivers high bandwidth for workloads
  • 1V operation reduces power draw per module
  • Validated for Supermicro SuperServer SYS-221BT-HNTR and similar systems

Server ECC RDIMM upgrade

This 128GB DDR5 5600 CL46 registered DIMM is built for Supermicro SuperServer SYS-221BT-HNTR, SYS-221GE-NR, SYS-221GE-TNHT-LCC, SYS-221HE-FTNR and SYS-221HE-FTNRD platforms. It targets administrators who need single-module capacity expansion in supported 288-pin slots.

Sustained error-corrected throughput

ECC registered operation corrects single-bit errors on the fly during continuous workloads, keeping data integrity intact across long compute or storage tasks. The 1.1V JEDEC voltage maintains stable power draw without exceeding platform limits.

Dense 4Rx4 module without spreader

A 4Rx4 organisation packs 128GB into one 288-pin RDIMM, leaving adjacent slots free for further upgrades. The bare PCB fits tight server chassis where heatsinks would block airflow, and registered signalling reduces electrical load on the memory controller.

How it compares

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

Price $3,870.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% 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 $30.24 per GB
Pricier than about 86% 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 number5R6D54R4128G
Total capacity128 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latency46
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro SuperServer SYS-221BT-HNTR
Supermicro SuperServer SYS-221GE-NR
Supermicro SuperServer SYS-221GE-TNHT-LCC
Supermicro SuperServer SYS-221HE-FTNR
Supermicro SuperServer SYS-221HE-FTNRD

Other versions of this model

5 more in the same range

Questions about this item

How much heat does the 128GB DDR5 5600 CL46 4Rx4 1.1V ECC RDIMM generate when running continuously?

The module operates at 1.1V with no heat spreader, so it relies on server chassis airflow to dissipate heat during sustained workloads.

What server platform must I already own for this 288-pin DDR5 ECC RDIMM to function?

It is validated for Supermicro SuperServer SYS-221BT-HNTR, SYS-221GE-NR, SYS-221GE-TNHT-LCC, SYS-221HE-FTNR and SYS-221HE-FTNRD systems.

Can I add this 4Rx4 registered DDR5 DIMM alongside existing unbuffered or load-reduced modules in my SuperServer?

No — the manufacturer states it cannot be mixed with unbuffered or ECC load-reduced memory; all installed DIMMs must be ECC registered.

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