We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four bare green DDR5 RDIMM sticks in a row

NEMIX RAM

NEMIX RAM 512GB (4×128GB) DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM memory upgrade

SKU CH-VEXN-GZBD5

A 512 GB kit of four 128 GB DDR5 4800 CL40 ECC registered DIMMs for Supermicro FatTwin and SuperServer systems

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity under load
  • 10 V operation reduces power draw per module
  • Validated for Supermicro FatTwin SuperServer SYS-F521E3-RTB and SYS-F511E2-RT

512 GB DDR5 4800 RDIMM kit

This 512 GB kit contains four 128 GB DDR5 4800 registered DIMMs built for Supermicro FatTwin and SuperServer platforms. It targets IT teams running memory-intensive workloads on validated server hardware.

ECC registered 4Rx4 modules

Each module uses 4Rx4 organisation with on-die ECC and a registered buffer to maintain signal integrity across all 288 pins. The 1.10 V operating voltage and CL40 timing match the platform specification without additional tuning.

Install in matched quad-channel sets

The four sticks must populate the correct quad-channel slots in the order shown in the Supermicro manual; mixing ranks or leaving gaps causes boot failure. No heat spreaders are fitted, so airflow across the bare PCB is required.

How it compares

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

Price $15,222.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $29.73 per GB
Pricier than about 85% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K4
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB (4 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 4Rx4 rank configuration require any firmware updates or module replacements as the Supermicro platform ages?

The kit uses major OEM Samsung, Micron or Hynix chips and is stress tested under load for reliability; no maintenance schedule is defined by the manufacturer beyond standard server memory handling.

What thermal limit appears first when the 512GB DDR5 4800 CL40 kit runs continuously at 1.1V in a dense Supermicro chassis?

With no heat spreader on the 288-pin RDIMMs, the DRAM junction temperature will reach its throttle point before the registered buffer or the 1.1V power delivery does.

How much additional power draw and waste heat does the 4×128GB ECC RDIMM kit generate under sustained 4800 MT/s operation?

Each module runs at 1.1V DDR5 standard voltage; total system power scales with the 512GB capacity and 4Rx4 organisation, but exact wattage depends on the Supermicro platform memory controller.

More in Model-Specific Memory Upgrades

Similar items