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Eight black DDR5 RDIMM sticks with silver heatspreaders

Corsair

Corsair CMA256GX5M8B5600C40 256GB (8 x 32GB) DDR5 5600 CL40 ECC Registered server RAM

SKU CH-YWCV-5V179 MPN CMA256GX5M8B5600C40

Eight 32 GB DDR5 RDIMM modules deliver 256 GB of ECC registered memory at 5600 MT/s with CL40 timings

  • Capacity256GB (8 x 32GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 5600 (PC5 44800)
  • CAS LatencyCL40
  • Timing40-40-40-77
  • Voltage1.25V
  • Massive 256GB capacity across eight 32GB modules
  • DDR5 5600 speed with PC5 44800 bandwidth
  • ECC Registered for data integrity in critical workloads
  • CL40 CAS latency with 40-40-40-77 tight timings
  • Intel XMP 3.0 profile enables rated performance in BIOS

High-capacity ECC Registered DDR5 kit

This Corsair WS RDIMM kit provides 256 GB across eight 32 GB modules running at DDR5 5600 with CL40 timings. Registered ECC operation corrects single-bit errors and reduces electrical load on the memory controller for stable workstation workloads. The 288-pin form factor fits server and workstation platforms that support registered DDR5 memory.

Sustained-load behaviour with XMP 3.0

Intel XMP 3.0 profiles let the kit reach its rated 5600 MT/s speed and 40-40-40-77 timings at 1.25 V without manual tuning. Rigorously screened ICs maintain tight timing consistency during extended compute sessions such as rendering, simulation or large-dataset analysis. Registered buffering helps preserve signal integrity when all eight slots are populated under continuous heavy traffic.

Platform checks before ordering

Verify that your workstation or server motherboard accepts 288-pin DDR5 RDIMMs and supports Registered ECC operation at the full 256 GB capacity. Confirm the BIOS includes Intel XMP 3.0 support to enable the rated speed and timings with a single setting. Ensure the CPU memory controller is qualified for eight-rank populated configurations at DDR5 5600.

Points forts

  • Massive 256GB capacity across eight 32GB modules
  • DDR5 5600 speed with PC5 44800 bandwidth
  • ECC Registered for data integrity in critical workloads
  • CL40 CAS latency with 40-40-40-77 tight timings
  • Intel XMP 3.0 profile enables rated performance in BIOS

Caractéristiques

BrandCORSAIR
SeriesWS RDIMM Series
Part NumberCMA256GX5M8B5600C40
Capacity256GB (8 x 32GB)
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
Poids d’expédition0.27 kg
Dimensions du colis155 × 78 × 41 mm

Questions sur cet article

How much power does the 1.25 V DDR5 5600 kit draw under sustained load?

The modules run at 1.25 V, the standard DDR5 operating voltage, which keeps power draw predictable for continuous workstation workloads.

What motherboard feature is required to use these 288-pin RDIMMs?

A workstation or server board with DDR5 RDIMM slots and registered-memory support is required; standard consumer UDIMM sockets will not accept them.

Can I mix these CL40 registered sticks with older unbuffered DDR5 in the same system?

No — registered and unbuffered DDR5 cannot be mixed, and the memory controller will not initialise a mixed population.

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