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Four green DDR5 UDIMM sticks with black chips no heat spreader

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 4800 ECC UDIMM memory upgrade

SKU CH-Z20A-PWWHR

128 GB DDR5 ECC UDIMM kit in four 32 GB modules at 4800 MHz CL40 1.1 V for Lenovo ThinkSystem SR250 V3

  • 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 speed rated at PC5-38400 for high throughput
  • ECC unbuffered design detects and corrects data errors
  • Low 1.10 V operating voltage reduces power draw
  • 288-pin UDIMM form factor fits Lenovo ThinkSystem SR250 V3

System-Specific DDR5 ECC Kit

This NEMIX RAM kit delivers 128 GB across four 32 GB unbuffered DDR5 modules rated at 4800 MT/s with CL40 latency and 1.1 V operation. It targets administrators upgrading Lenovo ThinkSystem SR250 V3 rack servers where ECC data integrity is required.

Upgrade From Lower-Capacity DDR5

The four-module layout replaces smaller DDR5 kits or mixed-capacity configurations to reach the server's maximum supported memory per channel. The jump is worth it when workloads exceed the capacity of a two-module setup and the platform can populate all four slots with 2Rx8 ECC UDIMMs.

DDR5 UDIMM Electrical Limits

Unbuffered DDR5 places the full electrical load of each rank on the memory controller, so signal integrity becomes the limiting factor at higher speeds or ranks. This kit operates at the standard 4800 MT/s JEDEC rate with 2Rx8 organisation; faster speeds or higher ranks would exceed the controller's drive capability on this platform.

How it compares

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

Price $2,818.99
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 $22.02 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

Does the 288-pin DDR5 UDIMM fit the Lenovo ThinkSystem SR250 V3 memory slots?

Yes, the 288-pin DDR5 ECC UDIMM modules are designed for the Lenovo ThinkSystem SR250 V3 rack server memory slots.

What is the correct way to install the 4x32GB kit, and which step is often missed?

Power off the server, open the chassis, align each module notch with the slot key, press firmly until the retention clips click, then verify all four modules are recognised in the BIOS.

When should the 128GB ECC UDIMM kit be replaced or serviced?

Replace modules only if the server reports uncorrectable ECC errors or fails memory diagnostics; otherwise no scheduled maintenance is required for the DDR5 UDIMM kit.

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