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Four bare green DDR5 UDIMM sticks in a kit

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 CL40 1.1V UDIMM for ASRock Z790 PG Riptide memory upgrade

SKU CH-DZZR-CZRX3

A 64 GB DDR5 kit with four 16 GB unbuffered UDIMMs running at 4800 MT/s, CL40, 1.1 V, validated for the ASRock Z790 PG Riptide motherboard

  • 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 expands multitasking headroom for demanding workloads
  • DDR5 4800 speed feeds data faster to compatible CPUs
  • CL40 latency keeps response tight under heavy loads
  • 1 V operation reduces power draw and heat output
  • Four 16 GB modules populate all slots on the ASRock Z790 PG Riptide

64GB DDR5 Kit for ASRock Z790 Riptide

This NEMIX RAM kit provides 64GB of DDR5 memory across four 16GB modules. It is built for the ASRock Z790 PG Riptide motherboard and runs at 4800MHz with a CL40 latency. The unbuffered, non-ECC UDIMMs operate at the standard 1.1V. Builders upgrading this specific board can install the matched set directly.

Suits single-board upgrades; not for mixed kits

The kit targets owners of the ASRock Z790 PG Riptide who want a validated four-module set. It fits standard desktop DIMM slots and requires no heat spreader clearance. Builders mixing this memory with existing modules of different speed, latency or voltage should look elsewhere, as stability cannot be guaranteed across mismatched kits.

4800MHz CL40 at 1.1V decides fit

The modules run at DDR5 4800 (PC5-38400) with a CAS latency of 40 and a 1.10V operating voltage. This exact speed and timing combination is what the motherboard expects for plug-and-play operation. If your build demands a different data rate or lower latency, this kit will not meet that requirement.

How it compares

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

Price $737.99
Pricier than about 57% 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 $11.53 per GB
Pricier than about 56% 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

Will the 4800 MHz DDR5 modules run at full speed alongside older DDR5 sticks I keep in the other slots?

Mixing memory kits with different speeds, latencies or voltage can prevent the system from reaching the rated 4800 MT/s and CL40 timings. For best stability, populate all four slots with this matched 64 GB kit.

How can I confirm the kit is running at 4800 MT/s and CL40 after installation?

Enter the UEFI BIOS and open the memory information screen; it should report 4800 MT/s (PC5-38400) and CL40. CPU-Z or HWiNFO in Windows will show the same figures on the SPD and Memory tabs.

Does the package include only the four 16 GB UDIMMs or are extra items such as a screwdriver or thermal pads supplied?

The box contains only the four 16 GB 288-pin DDR5 UDIMM modules. No tools, screws, thermal pads or additional accessories are included.

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