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Two green DDR5 UDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR5 4800 CL40 1.1V UDIMM ASRock Z790 PG Riptide

SKU CH-64BF-GE8K2

32 GB dual-channel DDR5 kit at 4800 MT/s with CL40 latency and 1.1 V operation for the ASRock Z790 PG Riptide motherboard

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 32 GB kit (2 × 16 GB) doubles desktop memory capacity
  • DDR5 4800 speed with CL40 latency for responsive system performance
  • Low 1.10 V operation reduces power draw and heat
  • Validated for ASRock Z790 PG Riptide motherboard compatibility
  • Built with major-brand Samsung, Micron or Hynix DRAM chips

ASRock Z790 PG Riptide Kit

This 32GB kit contains two 16GB DDR5 UDIMMs validated for the ASRock Z790 PG Riptide motherboard. The modules run at 4800 MT/s with a CL40 latency at 1.1V. They use major OEM chips and are non-ECC unbuffered.

Builders Matching This Board

The kit suits anyone upgrading or populating an ASRock Z790 PG Riptide system with guaranteed compatibility. Buyers needing ECC error correction or registered modules should look elsewhere, as this kit provides neither.

PC5-38400 Speed Rating

The decisive spec is the PC5-38400 rating, which confirms DDR5 4800 operation for this platform. Systems requiring a different data rate or voltage will not accept these modules.

How it compares

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

Price $377.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $11.81 per GB
Pricier than about 57% 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 numberMD38400-618K2
Total capacity32 GB (2 × 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 items32 GB (2 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

Questions about this item

Will these 288-pin DDR5 modules fit the four slots on my ASRock Z790 PG Riptide?

Yes — the kit is a 288-pin DDR5 UDIMM and the board uses the same DDR5 slot layout, so each 16 GB stick seats directly in any of the four DIMM sockets.

Do I need to enable XMP or EXPO in the BIOS after inserting the sticks, or will they run at 4800 CL40 automatically?

The modules are rated 4800 MT/s CL40 at 1.10 V JEDEC standard; they will boot at that speed without any manual profile, though you can still enable XMP if the board offers a higher profile.

Since there is no heat spreader, will I need extra airflow or a replacement kit later?

The bare PCB runs at standard 1.10 V DDR5 voltage; normal case airflow is sufficient, and the modules carry a lifetime replacement warranty if a stick ever fails.

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