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Four green DDR5 RDIMM modules with black heatspreaders

Corsair

Corsair CMA64GX5M4B6000C40 64GB (4x16GB) DDR5 6000 CL40 ECC Registered server RAM

SKU CH-WXV2-44YR5 MPN CMA64GX5M4B6000C40

Quad-channel kit delivers 64 GB of registered DDR5 6000 memory with ECC and CL40 timings for workstation reliability

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 6000 (PC5 48000)
  • ChipsetINTEL XMP 3.0
  • CAS latencyCL40
  • Memory timings40-40-40-77
  • Rated voltage1.35 V
  • ECC registered design protects data integrity for critical workloads
  • DDR5 6000 speed with CL40 latency accelerates high-end applications
  • Quad-channel 64 GB kit maximises workstation memory capacity
  • 35 V operation improves efficiency under sustained loads
  • Intel XMP 3.0 support enables simple one-click performance setup

64 GB DDR5 6000 quad-channel ECC kit

This Corsair WS RDIMM kit delivers 64 GB of DDR5 6000 memory across four 16 GB registered modules. It targets workstations that require error-correcting code for data integrity during high-end workloads. The CL40 latency and 1.35 V operating voltage support stable performance in demanding applications. Intel XMP 3.0 profiles simplify configuration on compatible platforms.

Registered 288-pin RDIMM build with heatspreader

Each module uses a 288-pin RDIMM form factor with a built-in heatspreader to manage thermals under sustained loads. Registered buffering reduces electrical load on the memory controller, allowing larger capacities per channel. The quad-channel kit layout matches workstation boards that populate four slots per processor. Modules are screened for reliable operation at the rated 6000 MT/s speed.

Verify DDR5 RDIMM support and XMP 3.0 BIOS option

Confirm your workstation motherboard accepts DDR5 registered DIMMs and supports quad-channel population rules before ordering. The platform must provide an Intel XMP 3.0 toggle or manual timing entry to reach 6000 MT/s CL40. Ensure the CPU memory controller is validated for 1.35 V registered modules at this frequency. Check maximum installed memory limits per socket.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $1,472.99
Pricier than about 83% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $23.02 per GB
Pricier than about 84% of the 6,064 comparable items (median $7.25 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 nameCORSAIR
Product lineWS RDIMM Series
Part numberCMA64GX5M4B6000C40
Total capacity64 GB (4 × 16 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6000 (PC5 48000)
Processor
ChipsetINTEL XMP 3.0
Memory
CAS latencyCL40
Memory timings40-40-40-77
ECC supportYes
Buffer typeRegistered
Kit configurationQuad Channel Kit
Power
Rated voltage1.35 V
Size & build
Shipping weight0.09 kg
Package size160 × 78 × 20 mm

Questions about this item

Does the DDR5 6000 PC5 48000 rating run at that speed on any motherboard, or is Intel XMP 3.0 required?

The kit is rated DDR5 6000 with timings 40-40-40-77 at 1.35 V. Intel XMP 3.0 applies those settings automatically in the BIOS; without XMP the modules will fall back to the platform default speed.

What slot type and module height does the 288-Pin DDR5 RDIMM need to fit in my workstation?

Each module is a standard 288-pin DDR5 RDIMM with an integrated heatspreader; it requires a DDR5 RDIMM slot and normal DIMM clearance — no extra height or proprietary connector.

What BIOS step enables the rated 6000 MT/s and CL40 timings on this quad-channel kit?

Enter the BIOS, locate the Intel XMP 3.0 profile for this kit, enable it, save and reboot; the common mistake is leaving XMP disabled so the memory runs at the lower JEDEC default instead.

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