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Two green 288-pin DDR5 UDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR5 4800 CL40 1.10V 2Rx8 UDIMM ASRock Z790 PG Riptide memory upgrade

SKU CH-PYKX-SSNVH

A 64 GB DDR5 kit (2 × 32 GB) running at 4800 MT/s with CL40 latency and 1.10 V, validated for the ASRock Z790 PG Riptide motherboard

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V
  • 64 GB capacity with two 32 GB modules
  • DDR5 4800 speed rated at PC5-38400
  • CL40 latency at 1.10 V operation
  • 288-pin UDIMM form factor fits desktop boards
  • 2Rx8 dual-rank organisation for density

64 GB DDR5 kit for ASRock Z790 PG Riptide

This 64 GB kit contains two 32 GB DDR5 UDIMM modules validated for the ASRock Z790 PG Riptide motherboard. It targets desktop builders and upgraders who need high-capacity memory for demanding workloads on this specific platform.

Unbuffered non-ECC modules at 1.1 V

The kit supplies unbuffered non-ECC memory operating at the standard 1.10 V DDR5 voltage. No heat spreader is included, and the modules rely on the board's own cooling and power delivery for stable operation at the rated speed.

4800 MT/s CL40 2Rx8 288-pin UDIMM

The modules run at DDR5 4800 (PC5-38400) with a CAS latency of CL40 in a dual-rank 2Rx8 organisation. This specification determines whether the memory matches the motherboard's qualified-vendor list and the builder's performance target.

How it compares

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

Price $829.99
Pricier than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $12.97 per GB
Pricier than about 59% 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 numberMD38400-328K2
Total capacity64 GB (2 × 32 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 rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items64 GB (2 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

Questions about this item

Will the 2Rx8 rank configuration require any firmware updates or module replacements over time on the ASRock Z790 PG Riptide?

The 2Rx8 dual-rank modules operate at standard 1.10V and CL40 timings with no heat spreader. They are validated for the Z790 PG Riptide and need no firmware updates or planned replacements under normal use.

What limit appears first during sustained loads — the CL40 latency ceiling or the 4800 MT/s throughput ceiling?

At DDR5 4800 the throughput ceiling is reached before CL40 latency becomes a bottleneck. The 38400 MB/s peak bandwidth of the PC5-38400 kit defines the sustained ceiling for the ASRock Z790 PG Riptide platform.

How much heat and power do the 1.10 V Samsung, Micron or Hynix ICs produce when the kit runs all day at 4800 MT/s?

At 1.10 V the modules draw minimal power and run cool without a heat spreader. The major-brand ICs are stress-tested under load, so all-day operation at 4800 MT/s stays within standard DDR5 thermal and power envelopes for the Z790 PG Riptide.

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