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Two green DDR5 RDIMM modules with gold contacts and black chips, no heat spreaders

OWC

OWC 32GB (2x16GB) DDR5 5200 PC5-41600 CL42 1Rx8 ECC Registered RDIMM server RAM

SKU CH-Q85T-YQ3EG

A 32 GB dual-channel DDR5 ECC registered RDIMM kit running at 5200 MT/s with CL42 latency for compatible workstations and servers

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank1Rx8

Capacity 32GB (2 x 16GB)

Show 4 more

Rank 1Rx8

  • Dual-channel 32 GB kit expands server capacity
  • DDR5 5200 MT/s speed accelerates data-intensive workloads
  • CL42 latency at 1.1 V balances responsiveness with efficiency
  • ECC registered design detects and corrects memory errors
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server-grade DDR5 ECC RDIMM kit

This OWC kit supplies 32 GB of DDR5 memory as two 16 GB registered DIMMs. Each module runs at 5200 MT/s with CL42 latency at 1.1 V and includes on-die ECC. The 288-pin RDIMM form factor is built for workstations, servers and NAS platforms that require registered memory.

Replaces unbuffered or slower registered modules

The upgrade is worthwhile when a system supports DDR5 RDIMM and needs error-correcting capacity for virtualisation, databases or ZFS workloads. Moving from single-channel or lower-speed registered memory to this dual-channel kit adds bandwidth and capacity without changing voltage or form factor.

Verify platform accepts DDR5 RDIMM before ordering

Confirm the motherboard or server chassis lists DDR5 5200 registered DIMM support and cannot mix with unbuffered or load-reduced modules. Check that the CPU and chipset provide enough memory channels for the two-module kit and that the BIOS is current enough for 1Rx8 density.

How it compares

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

Price $824.99
Pricier than about 78% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $25.78 per GB
Pricier than about 87% 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 nameOWC
Part number5R2D51R8032P
Total capacity32 GB (2 × 16 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5200 (PC5 41600)
Memory
CAS latencyCL42
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
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

What slot and pin count does this 288-pin DDR5 RDIMM require on the motherboard?

It installs in a standard 288-pin DDR5 RDIMM slot keyed for registered ECC modules.

Which sequence should I follow when populating the two 1Rx8 modules for dual-channel operation?

Insert the first module into the primary channel slot indicated by the board manual, then add the second into the matching channel slot; mixing registered with unbuffered or load-reduced DIMMs will prevent boot.

When should I consider replacing these 1.1V ECC registered modules?

Replace them if the system logs correctable ECC errors that climb steadily, if memory diagnostics report uncorrectable failures, or if a firmware update requires a different rank or speed configuration.

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