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
Eight black DDR5 RDIMM sticks with silver heatspreaders and gold contacts

Corsair

Corsair CMA128GX5M8B5600C40 128GB (8×16GB) DDR5 5600 CL40 ECC Registered server RAM

SKU CH-91E1-N88BC MPN CMA128GX5M8B5600C40

Eight 16 GB DDR5 RDIMMs totalling 128 GB at 5600 MT/s with CL40 ECC registered operation for workstation reliability

  • Capacity128GB (8 x 16GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 5600 (PC5 44800)
  • CAS LatencyCL40
  • Timing40-40-40-77
  • Voltage1.25V
  • ECC registered design protects data integrity for critical workloads
  • 128 GB capacity in eight 16 GB modules maximises workstation memory
  • DDR5 5600 speed with CL40 timings accelerates high-end applications
  • Intel XMP 3.0 support enables rated performance through a single BIOS setting
  • 25 V operation improves efficiency under sustained heavy loads

128GB DDR5 RDIMM kit for workstations

This Corsair WS RDIMM kit delivers 128GB across eight 16GB modules. It runs at DDR5 5600 with CL40 timings and operates at 1.25V. ECC registered design targets high-end workstation workloads that demand data integrity.

Check motherboard support for registered ECC DDR5

Verify your platform accepts 288-pin DDR5 RDIMMs with ECC and registered buffering. The kit uses Intel XMP 3.0 profiles for rated speed; confirm your BIOS exposes XMP for registered modules. Ensure eight DIMM slots are available for the full 128GB capacity.

Fills eight slots for maximum registered capacity

Eight modules populate all channels on compatible workstation boards, reaching 128GB without mixing kits. Registered signalling reduces electrical load on the memory controller at high densities. XMP 3.0 simplifies configuration to the rated 5600 MT/s profile.

Highlights

  • ECC registered design protects data integrity for critical workloads
  • 128 GB capacity in eight 16 GB modules maximises workstation memory
  • DDR5 5600 speed with CL40 timings accelerates high-end applications
  • Intel XMP 3.0 support enables rated performance through a single BIOS setting
  • 25 V operation improves efficiency under sustained heavy loads

Specifications

BrandCORSAIR
SeriesWS RDIMM Series
Part NumberCMA128GX5M8B5600C40
Capacity128GB (8 x 16GB)
Type288-Pin DDR5 RDIMM
SpeedDDR5 5600 (PC5 44800)
CAS LatencyCL40
Timing40-40-40-77
Voltage1.25V
ECCYes
Buffered/RegisteredRegistered
ChipsetINTEL XMP 3.0
FeaturesDesigned for Workstations: High-performance, reliable DDR5 memory designed for high-end workloads and applications.
Intel XMP Compatible ECC RDIMMs: Complete tasks quicker thanks to high-frequencies and tight timings with ECC Registered DDR5 Memory.
Rigorously tested: Carefully selected and screened modules ensure you can reliably reach the performance you need.
Maximize installed memory: Get the most from your workstation with kits available from 64GB all the way up to 256GB.
Simple Setup with Intel XMP 3.0: Easily set your memory to its rated speed and performance with a simple BIO
Shipping weight0.27 kg
Package size155 × 78 × 41 mm

Questions about this item

What comes in the box and do I need anything else to install the 288-Pin DDR5 RDIMM modules?

The kit includes eight 16GB DDR5 5600 RDIMM modules with heatspreaders; no extra parts are required for installation in a compatible server or workstation board.

Which capacity kit should I pick — 64GB, 128GB or 256GB — for a workstation that needs maximum registered ECC memory?

Choose the 128GB (8×16GB) kit to fill eight slots with registered ECC DDR5 5600 CL40 memory, or scale to 64GB or 256GB kits depending on your slot count and workload.

What does the DDR5 5600 (PC5 44800) rating deliver once the XMP 3.0 profile is enabled in the BIOS?

Enabling the Intel XMP 3.0 profile sets the modules to 5600 MT/s at CL40-40-40-77 timings and 1.25V, giving registered ECC bandwidth of PC5 44800 for high-end workloads.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.