We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (2×128GB) DDR5 5600 CL46 4Rx4 ECC RDIMM memory upgrade for Lenovo ThinkSystem SR680a V3

SKU CH-3RJ3-RNARR

A 256GB DDR5 kit of two 128GB ECC registered modules rated at 5600MT/s CL46 1.1V for Lenovo ThinkSystem SR680a V3

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB kit doubles server capacity with two 128 GB modules
  • DDR5 5600 speed feeds data at PC5-44800 bandwidth
  • ECC registered design corrects errors for mission-critical workloads
  • 4Rx4 organisation maximises density per 288-pin slot
  • 10 V operation reduces power draw under heavy load

Lenovo SR680a V3 DDR5 5600 RDIMM kit

This 256 GB kit contains two 128 GB DDR5 5600 registered DIMMs built for the Lenovo ThinkSystem SR680a V3. Each module runs at 1.1 V with CL46 latency and 4Rx4 organisation. ECC and registered buffering protect data integrity in demanding server workloads.

Suited for SR680a V3 capacity upgrades.

IT teams expanding memory in a compatible Lenovo rack server will find the correct speed, voltage and rank configuration here. Builders using consumer motherboards or systems that require unbuffered non‑ECC modules should look elsewhere because this kit is registered ECC RDIMM only.

4Rx4 registered ECC at DDR5 5600 decides fit

The decisive specification is the 4Rx4 registered ECC design running at DDR5 5600 (PC5‑44800). Only platforms that explicitly support this rank structure, voltage and form factor can use the kit. Verify the server memory list before purchasing.

How it compares

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

Price $8,330.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $32.54 per GB
Pricier than about 90% 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 nameNEMIX RAM
Product lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR5 5600 MHz ECC RDIMM Registered Server Memory
Part numberMR44800-744K2
Total capacity256 GB (2 × 128 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 (2 × 128 GB) DDR5 5600 MHz PC5-44800 4Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does my Lenovo ThinkSystem SR680a V3 need a specific BIOS version to recognise the 5600 CL46 4Rx4 registered modules?

The kit is built to the server's qualified DDR5 5600 PC5-44800 4Rx4 1.1V CL46 specification, so the existing firmware that supports this speed and rank configuration will detect both 128 GB modules at POST.

Can I keep my current DDR5 4800 RDIMMs installed in the other slots while adding this 256 GB kit?

The SR680a V3 memory controller will train all populated channels to the lowest common speed; mixing 4800 and 5600 RDIMMs is possible but the 5600 modules will run at 4800.

How do I confirm the 256 GB kit is operating at 5600 MT/s with ECC active after installation?

Enter the system BIOS or UEFI and verify the memory frequency reads 5600 MT/s, the total capacity shows 256 GB, and ECC status reports enabled for both modules.

More in Model-Specific Memory Upgrades

Similar items