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Two green 288-pin DDR5 UDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR5 4800 ECC UDIMM CL40 1.1V 2Rx8 memory upgrade

SKU CH-EP8B-KRZBK

A 64 GB DDR5 ECC UDIMM kit running at 4800 MT/s with CL40 latency and 1.1 V operation for Lenovo ThinkSystem ST50 V2 servers

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 64 GB total capacity for demanding server workloads
  • DDR5 4800 speed enables high-throughput data processing
  • ECC unbuffered design protects data integrity in critical tasks
  • 1 V operation reduces power draw per module
  • Validated for Lenovo ThinkSystem ST50 V2 compatibility

64 GB DDR5 ECC UDIMM kit

This 64 GB kit contains two 32 GB DDR5 4800 ECC unbuffered UDIMM modules. It is built for the Lenovo ThinkSystem ST50 V2 tower server and other compatible Lenovo platforms. The dual-rank 2Rx8 design adds error-correcting code protection for data integrity in server workloads. Operates at the standard 1.1 V DDR5 voltage.

Sustained server workload behaviour

Modules are stress-tested under load to verify stability during continuous operation. ECC circuitry detects and corrects single-bit errors without halting the system. Unbuffered topology keeps latency low while maintaining signal integrity at 4800 MT/s. The CL40 timing supports steady throughput for virtualisation and database tasks.

DDR5 4800 interface limits

The PC5-38400 standard defines a 4800 MT/s data rate with 288-pin mechanical keying. Maximum bandwidth is constrained by the JEDEC DDR5 4800 specification. Capacity per DIMM is fixed at 32 GB in this kit. Voltage is locked at 1.10 V by the DDR5 baseline. No higher speeds or lower latencies are guaranteed by this module rating.

How it compares

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

Price $1,310.99
Pricier than about 63% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $20.48 per GB
Pricier than about 66% 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 numberME38400-328K2
Total capacity64 GB (2 × 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 items64 GB (2 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

How much power does the 1.10V DDR5 kit draw when the server runs continuously?

Each module operates at 1.10V, the standard DDR5 voltage, keeping power draw low during extended operation.

What must the ThinkSystem ST50 V2 already have for this 288-pin ECC UDIMM kit to work?

The server needs free DDR5 UDIMM slots that support ECC unbuffered memory and a BIOS that recognises 2Rx8 modules.

Will the CL40 4800 MHz modules run stably alongside any older DDR5 sticks I keep in the same box?

All populated slots must run at the same speed and latency; mixing different CL or frequency kits forces the system to the slowest common settings.

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