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 green DDR5 RDIMM modules with black chips and gold contacts

NEMIX RAM

NEMIX RAM 512GB (4x128GB) DDR5 4800 CL40 1.1V 288-Pin ECC RDIMM Server Memory Upgrade

SKU CH-1KTX-1P0RC

512 GB DDR5 4800 ECC registered server kit with four 128 GB modules at CL40 and 1.1 V

  • 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 PC5-38400 bandwidth
  • ECC registered design protects data integrity
  • 1 V operation reduces server power draw
  • Validated for SuperMicro SYS-121H-TNR, SYS-221H-TNR, SYS-221H-TN24R

Server Memory Kit

This 512GB kit contains four 128GB DDR5 4800 RDIMM modules built for Supermicro servers. ECC and registered operation provide the error correction and signal integrity required by mission-critical workloads. The kit is validated for the SYS-121H-TNR, SYS-221H-TNR and SYS-221H-TN24R platforms.

DDR5 4800 Interface Limits

DDR5 4800 sets the maximum transfer rate at PC5-38400 with a CL40 latency at 1.10V. Registered DIMMs add a clock cycle for buffering, so the memory controller must support registered ECC operation. Systems limited to lower speeds or unbuffered DIMMs cannot use this kit.

4Rx4 Rank Configuration

Each 128GB module uses a 4Rx4 organisation that increases density but places higher electrical load on the memory bus. The server motherboard must explicitly support 4Rx4 registered DIMMs at this capacity. Boards qualified only for 1Rx4 or 2Rx4 ranks will not recognise the full 512GB.

How it compares

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

Price $14,772.99
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 $28.85 per GB
Pricier than about 81% 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

Should I choose the 512GB kit or look for a smaller capacity?

The kit provides 512GB total across four 128GB modules. Choose it if your Supermicro server needs maximum registered ECC capacity; otherwise select a smaller kit that matches your workload.

What does the DDR5 4800 CL40 rating deliver in a live server?

It runs at 4800 MT/s with CAS latency 40 at 1.1V, giving registered ECC bandwidth suited for heavy multi-threaded workloads on compatible Supermicro platforms.

How does the 288-pin RDIMM interface limit speed or capacity?

The 288-pin DDR5 RDIMM form factor supports the 4800 MT/s spec and 4Rx4 organisation; registered buffering allows the 512GB kit capacity on qualified Supermicro motherboards.

More in Model-Specific Memory Upgrades

Similar items