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Four green DDR5 UDIMM sticks without heat spreaders in a 64GB kit

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 CL40 1.1V 288-Pin UDIMM Kit

SKU CH-16KZ-JNEA7

64 GB kit of four 16 GB DDR5 modules at 4800 MT/s CL40, 1.1 V, unbuffered non-ECC 288-pin UDIMM for ASRock Z790 Lightning WiFi

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 64 GB kit gives ample capacity for demanding workloads
  • DDR5 4800 MT/s speed supports high-throughput desktop tasks
  • CL40 latency at 1.10 V balances responsiveness with efficiency
  • 288-pin UDIMM form factor fits standard desktop DIMM slots
  • Four 16 GB modules enable quad-channel bandwidth on compatible boards

ASRock Z790 Lightning WiFi Compatible Kit

This 64GB kit contains four 16GB DDR5 UDIMM modules built for the ASRock Z790 Lightning WiFi motherboard. Each stick runs at 4800 MT/s with CL40 latency at 1.1V. The unbuffered non-ECC design targets desktop builders who need a matched set validated for this specific board.

4800 MT/s CL40 DDR5 Speed

The single specification that decides fit is the DDR5 4800 PC5-38400 rating with CL40 timings at 1.10V. Your motherboard must support this exact data rate and voltage; slower or faster JEDEC profiles will not match the kit’s tested configuration. No heat spreader is fitted, so airflow over the bare PCB is required.

Four-Slot Population Frees Upgrade Path

Populating all four DIMM slots with 1Rx8 modules delivers 64GB immediately and leaves no empty slots for later expansion. The 288-pin DDR5 form factor fits standard desktop sockets, but the board must accept four ranks per channel at this speed. Builders who want room to add more memory later should consider a two-module kit instead.

How it compares

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

Price $807.99
Pricier than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $12.62 per GB
Pricier than about 58% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASRock Gaming Motherboard Compatible Series Memory
Model nameASRock DDR5 4800 MHz Non-ECC Unbuffered UDIMM
Part numberMD38400-618K4
Total capacity64 GB (4 × 16 GB)
Product type288-Pin DDR5 UDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items64 GB (4 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

Questions about this item

What does the DDR5 4800 speed rating mean for actual system performance?

The kit operates at 4800 MT/s with CL40 latency, giving the memory controller a baseline data rate of PC5-38400 for everyday workloads.

How does the DDR5 interface and PC5-38400 rating limit real-world throughput?

The DDR5 4800 standard caps the modules at 4800 MT/s; the PC5-38400 designation confirms that peak transfer rate, so bandwidth cannot exceed this specification.

What physical clearance is needed to install these four 288-pin UDIMM modules?

Each 16 GB stick is a standard-height 288-pin UDIMM without a heat spreader, so it fits any desktop DDR5 slot with normal DIMM spacing.

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