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Green rectangular DDR5 RDIMM module with black chips on both sides, gold edge connector, no heat spreader

NEMIX RAM

NEMIX RAM 64GB DDR5 5600 CL46 2Rx4 1.1V 288-Pin ECC RDIMM Lenovo SR780a V3 memory upgrade

SKU CH-JAYT-AH17G

A 64 GB DDR5 registered ECC module running at 5600 MT/s with CL46 latency and 1.1 V operation for Lenovo ThinkSystem SR780a V3 servers

  • Total capacity64 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB capacity expands server memory headroom for large workloads
  • DDR5 5600 speed delivers high bandwidth for data-intensive applications
  • ECC registered design detects and corrects errors to protect data integrity
  • 1 V operation reduces power draw in dense rack deployments
  • Validated for Lenovo ThinkSystem SR780a V3 ensures drop-in compatibility

Lenovo SR780a V3 Compatible DDR5 RDIMM

This 64GB registered DIMM is built for the Lenovo ThinkSystem SR780a V3 rack server. It targets IT teams upgrading memory capacity in that specific platform. The module uses DDR5 technology with ECC and registered buffering for enterprise stability.

CL46 latency at DDR5 5600

The single specification that determines fit is the CAS latency of CL46 running at DDR5 5600 (PC5-44800). This timing must match the server memory controller configuration for the module to operate at rated speed. A different latency value would prevent correct operation.

64GB capacity per module

One module provides 64GB of registered ECC memory using a 2Rx4 organisation at 1.10V. It handles large virtualisation workloads and in-memory databases comfortably. Capacity runs out when the server reaches its maximum DIMM slot limit or total memory ceiling.

How it compares

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

Price $1,905.99
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).
Price per GB $29.78 per GB
Pricier than about 85% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR5 5600 MHz ECC RDIMM Registered Server Memory
Part numberMR44800-924K1
Total capacity64 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items64 GB (1 × 64 GB) DDR5 5600 MHz PC5-44800 2Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How does the CL46 latency affect real-world server performance?

CL46 is the CAS latency at 5600 MT/s; the module runs at DDR5 5600 (PC5-44800) with 1.10 V, delivering standard JEDEC timing for registered ECC workloads.

What does the PC5-44800 rating actually limit in this system?

PC5-44800 equals 5600 MT/s DDR5 bandwidth; the registered ECC RDIMM operates at that speed with 2Rx4 organisation on the Lenovo ThinkSystem SR780a V3.

Will this 288-pin RDIMM fit the Lenovo SR780a V3 memory slots?

Yes — it is a 288-pin DDR5 ECC RDIMM built for the Lenovo ThinkSystem SR780a V3 rack server and installs in the standard DIMM sockets.

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