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 no heat spreaders

NEMIX RAM

NEMIX RAM 512GB (4x128GB) DDR5 4800 CL40 ECC RDIMM SuperMicro Compatible memory upgrade

SKU CH-P7FY-BADNR

512 GB DDR5 4800 registered ECC kit with four 128 GB modules for Supermicro UP SuperServer SYS-111C-NR and SYS-521C-NR

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512GB total capacity supports heavy virtualization and database workloads
  • DDR5 4800 speed delivers high bandwidth for data-intensive server tasks
  • ECC registered design detects and corrects memory errors for uptime
  • 1V operation reduces power draw in dense rack configurations
  • Validated for SuperMicro SYS-111C-NR SYS-521C-NR X13SEDW-F platforms

Capacity & Purpose

This 512GB kit consists of four 128GB DDR5 4800 CL40 ECC RDIMM modules built for SuperMicro UP SuperServer SYS-111C-NR and SYS-521C-NR platforms. It targets IT teams expanding memory capacity on compatible X13SEDW-F motherboards for virtualization, database or compute workloads that require registered error-correcting memory.

Upgrade Context

The kit replaces lower-capacity DDR5 RDIMM sets or fills empty slots on supported SuperMicro servers to reach the platform's maximum registered DIMM population. The jump is worth it when applications exceed current physical memory and the motherboard firmware supports 4Rx4 128GB modules at 4800 MT/s without downclocking.

Interface Limits

DDR5 4800 (PC5-38400) at 1.1V sets the electrical and timing boundary; the 288-pin RDIMM form factor and 4Rx4 organization restrict mixing with other ranks or speeds. Buyers who need higher data rates, lower latency or unbuffered DIMMs must select a different memory standard because this kit is fixed at CL40 registered operation.

How it compares

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

Price $16,542.99
Pricier than about 91% 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 $32.31 per GB
Pricier than about 90% 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 these 288-pin DDR5 modules fit the DIMM slots on a SuperMicro SYS-111C-NR or SYS-521C-NR server?

Yes, the kit is built for SuperMicro UP SuperServer SYS-111C-NR and SYS-521C-NR systems using 288-pin DDR5 RDIMM slots.

What is the correct sequence for installing the four 128 GB sticks so the server recognises all 512 GB?

Follow the motherboard manual for the X13SEDW-F; populate the recommended channels in the order shown, ensuring each 4Rx4 registered module clicks fully into its slot.

When should the ECC RDIMM kit be replaced if it starts reporting correctable errors under load?

Replace modules once the system logs show a rising correctable-error count or if stress tests fail, since ECC can only correct single-bit faults per 128 GB rank.

More in Model-Specific Memory Upgrades

Similar items