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Four green DDR5 RDIMM modules in anti-static tray

OWC

OWC 256GB (4x64GB) DDR5 4800 CL40 ECC Registered RDIMM for Dell PowerEdge C6600 C6620 MX760C R660 R6615

SKU CH-MGBZ-RVCZK

256 GB DDR5-4800 CL40 ECC registered RDIMM kit (four 64 GB modules) validated for Dell PowerEdge C6600, C6620, MX760C, R660 and R6615 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed with CL40 latency at 1.1 V
  • ECC registered RDIMM for data integrity in servers
  • 2Rx4 dual-rank organisation on 288-pin DDR5 form factor
  • Validated for Dell PowerEdge C6600, C6620, MX760C, R660, R6615

Dell PowerEdge DDR5 ECC RDIMM kit

This 256GB kit contains four 64GB DDR5 4800 CL40 registered ECC modules built for Dell PowerEdge C6600, C6620, MX760C, R660 and R6615 servers. It targets administrators who need maximum capacity in those specific platforms.

JEDEC DDR5 4800 registered ECC limits

The modules run at the standard 4800 MT/s JEDEC speed with CL40 latency and 1.1V operation. Registered ECC memory cannot be mixed with unbuffered or load-reduced DIMMs, and it will not work in standard desktop or consumer workstation boards.

288-pin RDIMM installation notes

Each stick is a 288-pin 2Rx4 registered DIMM without a heat spreader; seat them firmly until the ejector tabs click. The common error is populating slots in the wrong sequence for the target server, which prevents the system from posting.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $5,018.99
Pricier than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $19.61 per GB
Pricier than about 65% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell PowerEdge C6600
Dell PowerEdge C6620
Dell PowerEdge MX760C
Dell PowerEdge R660
Dell PowerEdge R6615

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 4x64GB kit or buy single 64GB modules to reach 256GB?

The 4x64GB kit delivers the full 256GB in matched modules, ensuring identical timing and rank configuration across all four slots for stable multi-channel operation.

What does the 4800MHz speed mean for my PowerEdge R660 workload?

The modules run at DDR5 4800 with CL40 latency, providing the standard JEDEC data rate supported by the R660 memory controller without overclocking.

Is the 288-pin RDIMM interface compatible with the C6620 and MX760C?

Yes, the 288-pin ECC Registered RDIMM form factor matches the DIMM slots on the C6620, MX760C and other listed PowerEdge servers.

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