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Eight green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

NEMIX RAM 256GB 8x32GB DDR5 6400 CL52 1.1V 1Rx4 ECC RDIMM Kit

SKU CH-AR4P-HR5RT

Eight-module 256 GB DDR5 kit with ECC and registered buffering runs at 6400 MT/s CL52 on 1.1 V for ASRock Rack GNRD16DNO and GNRD16QM3-NL boards

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 8X32GB

Show 4 more
  • 256 GB total capacity across eight 32 GB modules for maximum server density
  • DDR5 6400 speed with CL52 latency delivers rated bandwidth out of the box
  • Registered ECC architecture corrects single-bit errors and stabilises fully populated slots
  • 1 V operation matches the motherboard memory controller specification exactly
  • Validated for ASRock Rack GNRD16DNO and GNRD16QM3-NL motherboards

Kit Purpose

This 256GB kit delivers eight 32GB DDR5-6400 Registered ECC RDIMMs built to the exact rank, voltage and timing the ASRock Rack GNRD16DNO and GNRD16QM3-NL motherboards expect. It is for administrators who need the full 256GB capacity recognised at rated speed without manual tuning. It is not for desktop boards that accept only unbuffered UDIMMs or for systems limited to lower maximum memory per slot.

Capacity And Headroom

Eight single-rank 1Rx4 modules populate every slot at 1.1V and CL52, giving the platform its maximum supported density while ECC corrects single-bit errors on the fly. Registered buffering offloads the memory controller so all channels run fully populated at 6400 MT/s. The kit reaches its limit when a workload demands more than 256GB or requires speeds beyond the DDR5-6400 specification.

Build Fit

The 288-pin RDIMM form factor matches the server board's keying and population rules; no UDIMM or SODIMM alternative will seat correctly. Installation follows the motherboard manual's approved slot order to initialise every channel. Because the modules carry no heat spreaders, chassis airflow must be sufficient for dense, fully populated configurations.

How it compares

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

Price $9,773.99
Pricier than about 87% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $38.18 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-314K8
Total capacity256 GB (8 × 32 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock Rack
In the box
Included items256 GB 8 × 32 GB DDR5 6400 MHz PC5-51200 1Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

Will these 288-pin DDR5 6400 RDIMMs work in my ASRock Rack GNRD16DNO alongside older DDR5 modules?

This kit is verified for the ASRock Rack GNRD16DNO and GNRD16QM3-NL. Mixing with other DDR5 modules is not covered by the exact-match specification; consult your motherboard manual for supported population rules and approved DIMM configurations before adding this 256GB kit.

How can I confirm the kit runs at DDR5 6400 CL52 1.1V after installation?

Enter the system BIOS or UEFI and verify the memory frequency shows 6400 MT/s, CAS latency reads 52, and voltage is set to 1.10V. The registered ECC design allows the controller to train all eight 32GB ranks at the rated speed when populated per the board's guidelines.

What comes in the box and do I need extra parts to install the 8x32GB RDIMMs?

The package contains the 256GB kit — eight 32GB 288-pin DDR5 6400 CL52 1.1V 1Rx4 ECC registered RDIMMs. No additional cables, brackets or heat spreaders are included or required; install directly into the motherboard's DDR5 RDIMM slots following the manual's population order.

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