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 in anti-static tray

NEMIX RAM

NEMIX RAM CSE-GS7A-2000B 64GB (4x16GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-AQWG-KV4J7 MPN CSE-GS7A-2000B

A 64GB quad-channel DDR5-4800 ECC RDIMM kit with CL40 latency and 1.1V operation for Supermicro SuperWorkstation SYS-551A-T systems

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB total capacity from four 16 GB modules
  • DDR5 4800 speed for high-throughput server workloads
  • ECC registered design protects data integrity under load
  • 10 V operation reduces power draw per module
  • Validated for Supermicro SYS-551A-T workstation compatibility

SuperWorkstation SYS-551A-T upgrade

This 64 GB kit contains four 16 GB DDR5 ECC RDIMM modules built for the SuperMicro SuperWorkstation SYS-551A-T. Registered buffering and error correction suit enterprise workloads that require data integrity. The kit targets IT professionals who maintain or expand compatible Supermicro platforms. Buyers needing non-ECC memory or consumer desktop modules should look elsewhere.

Sustained enterprise load behaviour

Modules operate at DDR5 4800 with CL40 latency and 1.10 V across all four slots. Registered design reduces electrical load on the memory controller during continuous operation. ECC detects and corrects single-bit errors that can accumulate under long-running server tasks. The 1Rx8 organisation supports stable throughput without the timing penalties of dual-rank configurations.

Installation notes for registered ECC

Each 288-pin RDIMM seats in the standard DDR5 slot but requires a motherboard that supports registered ECC memory. The SuperWorkstation SYS-551A-T manual defines the correct population order for four modules. A common issue is mixing these registered sticks with unbuffered DIMMs, which prevents boot. Verify BIOS revision before installation to ensure full compatibility.

How it compares

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

Price $1,642.99
Pricier than about 66% 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 $25.67 per GB
Pricier than about 70% 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 numberMR38400-618K4
Total capacity64 GB (4 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items64 GB (4 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How much power does the 1.1 V DDR5 4800 RDIMM kit draw when the SuperWorkstation runs all day?

Each module operates at 1.1 V with a CL40 1Rx8 layout, so the four 16 GB sticks together run at the standard DDR5 4800 voltage without extra heat spreaders.

What must the system already provide for these 288-pin registered ECC modules to work?

The motherboard needs DDR5 RDIMM slots, an ECC-capable memory controller and a BIOS that accepts registered 1Rx8 modules at 4800 MT/s.

Will the CL40 4800 MT/s kit run stably beside older DDR5 4800 modules already in the SuperWorkstation?

Yes, all sticks share the same 1.1 V voltage, 4800 speed and CL40 timing, so the memory controller can train them together without down-clocking.

More in Model-Specific Memory Upgrades

Similar items