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Eight green DDR5 ECC RDIMM sticks in anti-static tray

OWC

OWC 512GB (8x64GB) DDR5 5200 PC5-41600 CL42 2Rx4 288-pin 1.1V ECC Registered RDIMM server RAM

SKU CH-4Q64-KYMMY

Eight 64 GB DDR5 5200 ECC registered DIMMs totalling 512 GB for workstations, servers and NAS systems

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 512GB (8 x 64GB)

Show 4 more

Rank 2Rx4

  • 512 GB total capacity from eight 64 GB modules
  • DDR5 5200 speed rated at PC5-41600 for high throughput
  • ECC registered design detects and corrects data errors
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Low 1.1 V operation reduces server power draw

512 GB DDR5 ECC RDIMM kit

This kit provides 512 GB of DDR5 memory across eight 64 GB registered DIMMs. It is built for workstations and servers that require error-correcting code and registered buffering. Standard desktop platforms cannot use this memory. It is not for systems that only accept unbuffered or load-reduced modules.

Sustained 5200 MT/s operation

The modules run at 5200 MT/s with a CAS latency of 42 at 1.1 V. JEDEC-standard timings keep performance stable during extended workloads. Registered buffering reduces electrical load on the memory controller. ECC corrects single-bit errors to protect data integrity over long runs.

Verify registered DIMM support

Confirm the motherboard or system accepts 288-pin DDR5 ECC registered DIMMs. Check that the platform supports 2Rx4 rank organisation and 1.1 V operation. Ensure the memory controller can address 512 GB total capacity across eight slots. Do not mix with unbuffered or load-reduced memory.

How it compares

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

Price $12,814.99
Pricier than about 91% of the 6,523 comparable items (median $188.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 91% of the 6,064 comparable items (median 32 GB).
Price per GB $25.03 per GB
Pricier than about 86% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number5R2D52R4512K
Total capacity512 GB (8 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5200 (PC5 41600)
Memory
CAS latencyCL42
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

5 more in the same range

Questions about this item

How much power does the 1.1 V DDR5 kit draw when the server runs continuously?

Each 64 GB module operates at the JEDEC-standard 1.1 V, so the eight-module kit runs at the same voltage as any compliant DDR5 5200 registered DIMM.

Does my motherboard need DDR5 slots and a registered-DIMM memory controller to use this 512 GB kit?

The kit requires a platform with 288-pin DDR5 RDIMM slots that support ECC registered memory; standard desktop boards without a registered controller will not accept it.

Can I mix these 2Rx4 registered modules with load-reduced or unbuffered DIMMs already in my system?

OWC states the modules cannot be mixed with unbuffered or ECC load-reduced memory; all slots must use registered ECC DIMMs for the kit to function.

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