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Four green DDR4 UDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB 4x32GB DDR4 3200MHz PC4-25600 CL22 ECC UDIMM memory upgrade

SKU CH-NP1W-F53MP

128 GB kit of four 32 GB DDR4 3200 MHz ECC UDIMMs at CL22 and 1.2 V for Supermicro X12STE-F and X12STD-F motherboards

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeUnbuffered

Size 128GB 4X32GB

  • 128 GB total capacity from four 32 GB modules for high-density workloads
  • DDR4 3200 MHz PC4-25600 speed matches the board's rated frequency
  • CL22 latency at 1.20 V delivers stable timing the controller expects
  • ECC UDIMM corrects single-bit errors to protect data integrity
  • Verified fitment for Supermicro X12STE-F and X12STD-F motherboards

Supermicro X12STE-F/X12STD-F upgrade

This 128GB kit uses four 32GB DDR4 3200MHz PC4-25600 ECC unbuffered UDIMMs built for Supermicro X12STE-F and X12STD-F motherboards. The modules run at 1.2V with CL22 timing and a 2Rx8 rank layout that matches the board's memory controller expectations. Error-correcting code protects data integrity for workloads that cannot tolerate silent corruption.

Exact-match replacement for mixed kits

The kit replaces mismatched or lower-capacity DIMMs that force the system to run at reduced speeds or disable ECC. Populating all four slots with identical 2Rx8 modules lets the controller train at the rated 3200MHz without downclocking. Builders who need registered RDIMMs or laptop SODIMMs cannot use this product.

Sustained ECC operation at rated speed

Under continuous load the unbuffered design keeps latency low while ECC corrects single-bit errors in real time. The 1.2V operating voltage stays within the motherboard's standard power envelope during extended sessions. Systems requiring higher frequencies or lower latencies than CL22 will not achieve those targets with this memory.

How it compares

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

Price $834.99
Pricier than about 59% 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 $6.52 per GB
Cheaper than about 60% 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 nameDDR4 ECC Unbuffered UDIMM Memory
Part numberME25600-328K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL22
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB 4 × 32 GB DDR4 3200 MHz PC4-25600 2Rx8 1.2 V 288-PIN ECC UDIMM KIT

Other versions of this model

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Questions about this item

Will the 288-pin DDR4 UDIMM modules fit the Supermicro X12STE-F motherboard?

Yes, the 288-pin DDR4 ECC UDIMM form factor matches the motherboard's DIMM slots exactly. The kit is verified for the X12STE-F and X12STD-F boards and is not an RDIMM or SODIMM.

What is the correct installation order for the four 32GB modules on the X12STE-F?

The motherboard manual defines the approved DIMM population order for 2Rx8 modules. Follow that sequence so the memory controller recognises the full 128GB at the rated 3200MHz speed.

Do these ECC UDIMMs require any firmware updates or ongoing maintenance after installation?

No firmware updates are needed for the memory itself. The modules run at 1.2V with CL22 timing. If a module ever fails, the lifetime replacement warranty covers a swap.

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