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Four green DDR5 RDIMM sticks in a row

NEMIX RAM

NEMIX RAM 256GB (4×64GB) DDR5 5600 CL46 ECC RDIMM memory upgrade for Lenovo ThinkSystem SR780a V3

SKU CH-RN8Q-JD1XS

Adds 256 GB of DDR5 ECC registered memory in four 64 GB modules running at 5600 MHz with CL46 latency for the Lenovo ThinkSystem SR780a V3

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity across four 64 GB modules
  • DDR5 5600 speed for high-throughput server workloads
  • ECC registered design detects and corrects memory errors
  • 1 V operation reduces power draw per module
  • 288-pin RDIMM form factor fits Lenovo ThinkSystem SR780a V3

System-Specific DDR5 Kit

This 256GB kit contains four 64GB registered DDR5 modules built for the Lenovo ThinkSystem SR780a V3 rack server. It targets administrators who need to expand memory capacity in that exact platform without mixing module types.

Registered ECC with 4Rx4 Organisation

Each module runs at 5600 MT/s with a CAS latency of 46 at 1.1V and uses a 4Rx4 layout on 288-pin RDIMM form factor. The registered buffer and on-die ECC provide the signal integrity and error correction required by the qualified server motherboard.

Four-Module Population for Maximum Capacity

Populating four slots with this matched kit delivers the full 256GB in a balanced configuration, leaving remaining DIMM slots available for future expansion. The kit eliminates the need to source individual sticks and ensures identical rank structure and timing across all populated channels.

How it compares

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

Price $8,046.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.43 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR44800-944K4
Total capacity256 GB (4 × 64 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items256 GB (4 × 64 GB) DDR5 5600 MHz PC5-44800 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

What does CL46 mean for real-world latency at 5600 MT/s?

CL46 sets the CAS latency at 46 cycles; the kit runs at 5600 MT/s with 1.1 V ECC registered operation, giving consistent timing for server workloads.

How does the PC5-44800 rating limit usable bandwidth?

PC5-44800 is the peak transfer rate at 5600 MT/s; the registered ECC design and 4Rx4 organisation keep data integrity within that ceiling.

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

Yes, the 288-pin DDR5 RDIMM form factor matches the Lenovo ThinkSystem SR780a V3 memory slots for direct installation.

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