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Four black DDR5 RDIMM modules with silver heatspreaders, 288 pins each

Corsair

Corsair CMA64GX5M4B5600C40 64GB (4×16GB) DDR5 5600 CL40 ECC Registered server RAM

SKU CH-TC0T-2ZYY9 MPN CMA64GX5M4B5600C40

64 GB quad-channel DDR5 kit with four 16 GB ECC registered modules running at 5600 MT/s CL40 and 1.25 V

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetINTEL XMP 3.0
  • CAS latencyCL40
  • Memory timings40-40-40-77
  • Rated voltage1.25 V
  • ECC protection prevents data errors in critical workloads
  • Registered design stabilises signal integrity across 64 GB capacity
  • DDR5 5600 speed with CL40 latency accelerates demanding applications
  • Quad-channel kit maximises bandwidth for workstation throughput
  • Intel XMP 3.0 enables rated performance through simple BIOS setup

Quad-channel DDR5-5600 kit for workstations

This 64 GB kit contains four 16 GB registered DIMMs built for workstation platforms that require ECC integrity. Each module runs at DDR5 5600 with CL40 timings and a 1.25 V operating voltage. The quad-channel population fills four slots at once, delivering high bandwidth for memory-intensive workloads.

Thermal and power profile

Registered DDR5 modules operate at 1.25 V, keeping power draw modest under sustained compute loads. The integrated heatspreader dissipates heat across the PCB so temperatures remain stable during long renders or simulations. No active cooling is required; typical case airflow is sufficient for normal operation.

Build integration

The 288-pin RDIMM form factor fits standard DDR5 server and workstation motherboards that support registered ECC memory. Intel XMP 3.0 allows the rated speed and timings to be applied with a single BIOS setting. Kits scale from 64 GB up to 256 GB, leaving headroom for future capacity expansion.

How it compares

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

Price $910.99
Pricier than about 80% 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 $14.23 per GB
Pricier than about 74% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameCORSAIR
Product lineWS RDIMM Series
Part numberCMA64GX5M4B5600C40
Total capacity64 GB (4 × 16 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetINTEL XMP 3.0
Memory
CAS latencyCL40
Memory timings40-40-40-77
ECC supportYes
Buffer typeRegistered
Kit configurationQuad Channel Kit
Power
Rated voltage1.25 V
Size & build
Shipping weight0.09 kg
Package size160 × 78 × 20 mm

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules and what step is commonly missed?

Align the notch on each 288-pin DDR5 RDIMM with the slot key, press firmly until both retention clips click, then enable Intel XMP 3.0 in BIOS so the kit runs at DDR5 5600 CL40 instead of the default JEDEC speed.

What maintenance or replacement will this 64GB quad-channel kit need over time?

No routine maintenance is required; the modules are screened for stability at 1.25V. If a module fails, replace it with an identical 16GB DDR5 5600 CL40 registered ECC stick to keep quad-channel timing 40-40-40-77 intact.

What limit appears first when the registered ECC memory runs sustained workloads?

The CAS latency CL40 and 40-40-40-77 timing set the latency floor; under continuous load the 1.25V operating voltage and registered buffer keep signal integrity stable up to the rated DDR5 5600 speed.

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