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Two green DDR5 RDIMM modules, bare chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 5600MHz CL46 4Rx4 ECC RDIMM memory upgrade for Lenovo ThinkSystem ST650 V3

SKU CH-E7Z3-XSTBM

A 128 GB DDR5 ECC RDIMM kit with two 64 GB modules at 5600 MHz CL46 for Lenovo ThinkSystem ST650 V3 servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • ECC protection prevents data errors with registered DDR5 modules
  • 128GB total capacity from two 64GB sticks expands server memory
  • 5600MHz DDR5 speed delivers high bandwidth for demanding workloads
  • CL46 latency at 1.1V balances performance and power efficiency
  • 288-pin RDIMM form factor fits Lenovo ThinkSystem ST650 V3 tower server

Lenovo ThinkSystem ST650 V3 server upgrade

This 128 GB kit contains two 64 GB DDR5 5600 registered ECC RDIMMs built for the Lenovo ThinkSystem ST650 V3 tower server. Each module runs at 1.1 V with CL46 latency and a 4Rx4 organisation. The 288-pin form factor matches the platform's memory slots exactly.

Suited for capacity-bound workloads on this platform

The kit targets administrators expanding memory on a validated Lenovo ThinkSystem ST650 V3 configuration. Systems requiring unbuffered UDIMMs or non-ECC memory cannot use these registered modules. Buyers needing different capacities, speeds or rank layouts should select a kit specified for those requirements.

Registered ECC with 4Rx4 rank layout

The modules implement registered signalling and on-die ECC in a 4Rx4 arrangement at DDR5 5600. This rank density and buffering scheme is the decisive compatibility factor for the target server; mismatched rank counts or unbuffered designs will not function in the qualified slots.

How it compares

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

Price $4,102.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $32.05 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 numberMR44800-944K2
Total capacity128 GB (2 × 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 items128 GB (2 × 64 GB) DDR5 5600 MHz PC5-44800 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Should I choose the 128GB kit or a different capacity for my ThinkSystem ST650 V3?

This kit provides 128GB total across two 64GB modules, the only capacity offered for this part number.

What does the 5600MHz rating mean once installed in the server?

The modules run at DDR5 5600 (PC5-44800) with CL46 latency at 1.1V, delivering the rated throughput when the platform enables that speed.

Does the 288-pin RDIMM interface limit anything in the ThinkSystem ST650 V3?

The 288-pin DDR5 RDIMM form factor is the native slot type for this server, so the registered ECC modules fit and operate without adapter or downshift.

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