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Four green DDR5 ECC UDIMM sticks, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 4800 CL40 ECC UDIMM Lenovo ST50 V2

SKU CH-HWMD-B9G8P

128GB quad-channel DDR5 4800 ECC UDIMM kit with CL40 latency and 1.1V operation for Lenovo ThinkSystem ST50 V2 tower servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 128 GB total capacity across four 32 GB modules
  • DDR5 4800 MT/s speed rated at PC5-38400
  • ECC unbuffered UDIMM protects data integrity in server workloads
  • 10 V low-voltage operation reduces power draw
  • 288-pin 2Rx8 layout validated for Lenovo ThinkSystem ST50 V2

System-Specific DDR5 ECC Kit

This 128GB kit contains four 32GB DDR5 4800 modules built for the Lenovo ThinkSystem ST50 V2 tower server. ECC unbuffered UDIMMs protect data integrity in workloads that cannot tolerate silent corruption. IT teams upgrading that platform receive a matched set validated for the system memory slots. Buyers needing registered DIMMs or a different form factor must look elsewhere.

Thermals and Power Profile

Modules operate at 1.10V without heat spreaders, relying on server chassis airflow for cooling. The 2Rx8 organisation and CL40 latency run within standard DDR5 4800 power limits during sustained loads. No active cooling or additional voltage headroom is required for normal operation. Builders targeting overclocked memory profiles or passive low-airflow enclosures should verify compatibility first.

What the Package Delivers

The box supplies four 288-pin UDIMMs totalling 128GB and nothing else — no software, no cables, no extra brackets. Installation follows the server maintenance manual and typically takes minutes per module. NEMIX RAM stress-tests each kit before shipment and backs it with a lifetime replacement guarantee. Customers expecting bundled diagnostics, firmware tools or mounting hardware will not find them here.

How it compares

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

Price $2,754.99
Pricier than about 72% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $21.52 per GB
Pricier than about 67% 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 4800 MHz ECC Unbuffered UDIMM
Part numberME38400-328K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 ECC UDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

How do I install the 288-pin DDR5 UDIMMs in my Lenovo ThinkSystem ST50 V2, and what step is often missed?

Power off the server, open the chassis, align each module's notch with the slot key, press firmly until both retention clips click, then verify all four 32 GB modules appear in BIOS before booting the OS.

What maintenance or replacement will the ECC UDIMM kit need over its service life?

No scheduled maintenance is required; if a module fails, replace the faulty 32 GB stick with an identical DDR5 4800 CL40 2Rx8 1.10 V ECC UDIMM to keep the 128 GB quad-channel configuration intact.

What limit appears first when the memory runs sustained workloads at 4800 MT/s?

The CL40 CAS latency at 1.10 V sets the timing boundary; sustained throughput cannot exceed the DDR5 4800 PC5-38400 rating without increasing voltage or relaxing latency.

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