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Green rectangular DDR4 RDIMM with black chips, no heat spreader, gold edge connectors

OWC

OWC 128GB DDR4 3200 CL22 8Rx4 288-pin 1.2V ECC Registered RDIMM for Dell PowerEdge XR11 XR12 XR4510c XR4520c

SKU CH-25FG-Z26VZ

A single 128GB DDR4 3200 ECC registered RDIMM for Dell PowerEdge XR11, XR12, XR4510c, XR4520c and R7525 servers

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB capacity expands server memory headroom
  • DDR4 3200 speed delivers high bandwidth for demanding workloads
  • ECC registered design protects data integrity in critical applications
  • 2 V operation reduces power draw per module
  • Compatible with Dell PowerEdge XR11 XR12 XR4510c XR4520c and R7525

Server-grade ECC RDIMM

This OWC module delivers 128GB of DDR4 ECC registered memory built for Dell PowerEdge XR11, XR12, XR4510c, XR4520c and R7525 servers. It operates at 3200MHz with CL22 latency and 1.2V power draw. The 8Rx4 288-pin RDIMM format ensures compatibility with registered-memory platforms only.

Sustained workload stability

ECC registration corrects single-bit errors on the fly while the registered buffer reduces electrical load on the memory controller during continuous operation. Backward compatibility with 2133, 2400, 2666 and 2933MHz systems allows deployment in mixed-speed configurations without timing conflicts. JEDEC and RoHS compliance guarantees consistent behaviour under extended duty cycles.

128GB single-module capacity

One stick provides the full 128GB, maximising slot efficiency in dense server chassis. Buyers needing unbuffered or load-reduced DIMMs cannot use this module. Systems limited to lower per-slot densities or non-ECC memory must select a different part.

How it compares

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

Price $732.99
Pricier than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 22
Typical for this category: the median of 483 items is 22.
Price per GB $5.73 per GB
Cheaper than about 68% of the 20,941 comparable items (median $8.19 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 number3R2D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latency22
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell PowerEdge XR11
Dell PowerEdge XR12
Dell PowerEdge XR4510c
Dell PowerEdge XR4520c
Dell PowerEdge R7525

Questions about this item

Does the 1.2V DDR4 module add noticeable heat or fan noise when the PowerEdge runs 24/7?

At 1.2 volts the 128GB RDIMM draws standard DDR4 power, so thermal impact inside a Dell PowerEdge XR11, XR12, XR4510c, XR4520c or R7525 is minimal and fan curves stay unchanged.

My server currently has unbuffered ECC DIMMs — can I add this 8Rx4 registered module alongside them?

No — the module is ECC registered (RDIMM) and the manufacturer states it cannot be mixed with unbuffered or load-reduced memory; all slots must use registered DIMMs.

Will the 3200MHz CL22 stick down-clock reliably if my R7525 only supports 2666MHz?

Yes — the spec lists backward compatibility with 2133, 2400, 2666 and 2933MHz, so the module will run at the highest speed the platform allows.

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