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Green rectangular memory module with gold edge connector and black chips, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR5 5600 CL46 ECC UDIMM Lenovo ThinkSystem ST45 V3 memory upgrade

SKU CH-STHA-Q4AFH

16GB DDR5 ECC UDIMM at 5600MHz CL46 for Lenovo ThinkSystem ST45 V3 tower servers

  • Total capacity16 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • ECC protection safeguards data integrity with built-in error correction
  • 5600 MHz DDR5 speed delivers high bandwidth for server workloads
  • 1 V low-voltage operation reduces power draw and heat
  • 1Rx8 single-rank layout ensures broad motherboard compatibility
  • Validated for Lenovo ThinkSystem ST45 V3 tower server

16 GB DDR5 ECC UDIMM for Lenovo ThinkSystem ST45 V3

This 16 GB DDR5 ECC unbuffered UDIMM is built for the Lenovo ThinkSystem ST45 V3 tower server. It targets administrators who need error-correcting memory to protect data integrity in entry-level server workloads. The single-rank module runs at 5600 MT/s with CL46 latency. It arrives new and ready for installation.

Fits 288-pin DDR5 slots at 1.1 V

The module uses the standard 288-pin DDR5 form factor and operates at 1.10 V. It requires a motherboard that supports DDR5 ECC unbuffered UDIMMs and the correct memory-channel population rules for the ST45 V3. No heat spreader is fitted, leaving the DRAM exposed for direct airflow from the server chassis fans. One 16 GB stick is supplied per package.

Low-voltage DDR5 reduces power draw

At 1.10 V the DDR5 ICs draw less power per bit than earlier generations, helping the server stay within its thermal envelope. The absence of a heat spreader means chassis airflow passes directly over the chips, keeping temperatures in check without adding acoustic load. ECC operation adds minimal overhead while correcting single-bit errors in real time.

How it compares

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

Price $372.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $23.31 per GB
Pricier than about 68% 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 Memory
Model nameDDR5 ECC Unbuffered UDIMM Memory
Part numberME44800-618K1
Total capacity16 GB
Product type288-Pin DDR5 ECC UDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL46
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items16 GB (1 × 16 GB) DDR5 5600 MHz PC5-44800 1Rx8 1.1 V 288-PIN ECC UDIMM

Questions about this item

Will the CL46 latency limit throughput when this 16 GB DDR5 5600 module runs sustained workloads?

CL46 is the rated CAS latency at 5600 MT/s; the module operates at 1.10 V and uses major OEM Samsung, Micron or Hynix chips, so latency stays at spec under continuous load.

Does the lack of a heat spreader make this ECC UDIMM run hot or noisy in a ThinkSystem ST45 V3 running all day?

The unbuffered DDR5 stick runs at 1.10 V with no heat spreader; server chassis airflow handles cooling, and the module itself adds no moving parts or noise.

What must already be installed in the ThinkSystem ST45 V3 for this 288-pin DDR5 ECC UDIMM to work?

The server must support DDR5 ECC unbuffered UDIMMs at 5600 MT/s and have a free 288-pin slot; the module is qualified for that exact platform.

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