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Four green DDR4 UDIMM sticks without heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR4 3200 CL22 ECC UDIMM Gigabyte B550-AORUS memory upgrade

SKU CH-D8E1-1CNJK

128 GB kit of four 32 GB DDR4 3200 CL22 ECC unbuffered UDIMMs for Gigabyte B550-AORUS motherboards

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL22
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 128GB total capacity across four 32GB modules
  • DDR4 3200 speed with PC4-25600 bandwidth rating
  • ECC unbuffered design for data integrity protection
  • CL22 CAS latency at 1.2V operating voltage
  • 288-pin 2Rx8 configuration built for Gigabyte B550-AORUS compatibility

Gigabyte B550-AORUS compatible DDR4 kit

This 128GB kit contains four 32GB DDR4 3200 modules validated for Gigabyte B550-AORUS motherboards. It targets workstation and server builders who need ECC protection on a consumer platform. The unbuffered UDIMM design fits standard desktop DIMM slots without requiring registered memory support. Buyers needing registered DIMMs or capacities beyond 128GB should look elsewhere.

Thermals and power at stock settings

Each module operates at 1.2V with no heat spreader attached, so airflow across the bare PCB handles cooling. At CL22 latency the kit runs within standard DDR4 power limits for typical workloads. Audible noise is negligible because the modules have no active cooling. Systems with restricted case airflow may see higher temperatures under sustained load.

ECC unbuffered UDIMM at DDR4 3200 CL22

The decisive specification is ECC unbuffered operation at DDR4 3200 with CL22 timing, which must be supported by the motherboard BIOS and memory controller. Without ECC support the modules will still function but error correction will be inactive. Verify that your Gigabyte B550-AORUS board enables ECC with unbuffered DIMMs before purchase.

How it compares

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

Price $972.99
Pricier than about 60% 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 $7.60 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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Specifications

Product
Brand nameNEMIX RAM
Product lineGigabyte Gaming Motherboard Compatible Series Memory
Model nameGigabyte DDR4 3200 MHz ECC Unbuffered UDIMM
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
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsGigabyte
In the box
Included items128 GB (4 × 32 GB) DDR4 3200 MHz PC4-25600 2Rx8 1.2 V CL22 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

How do I install the 288-pin DDR4 UDIMM modules in the B550-AORUS board, and which step is often missed?

Align the notch on each 288-pin module with the slot key, press straight down until both side clips click, then verify in BIOS that all four 32 GB sticks show at 3200 MT/s with CL22 timings.

What maintenance or replacement will the ECC UDIMM kit need over time?

The modules have no heat spreaders and run at 1.20 V, so only occasional dust removal from the gold contacts is needed; ECC error correction handles single-bit errors internally without user action.

What limit appears first when the 128 GB kit runs sustained workloads?

The CL22 latency at 3200 MT/s sets the throughput ceiling, and the unbuffered 2Rx8 organization means the memory controller manages all ranks directly under heavy load.

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