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Single green 288-pin DDR4 RDIMM module with black memory chips, no heat spreader

OWC

OWC 128GB DDR4 3200 PC4-25600 CL22 8Rx4 ECC RDIMM 288-pin memory upgrade

SKU CH-ZZD4-3WER9

128 GB DDR4 3200 ECC registered RDIMM for Supermicro H12DS series servers and workstations

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB single-module capacity for high-density server builds
  • ECC registered design protects data integrity in critical workloads
  • DDR4 3200 CL22 speed matches platform specifications
  • 2 V operation reduces power draw per module
  • Validated for Supermicro H12DSi-NT6, H12DSQ-NT6, H12DST-B, H12DSU-iN, H12DSU-iNR

128GB DDR4 3200 ECC RDIMM Upgrade

This single 128GB DDR4 3200 PC4-25600 CL22 8Rx4 288-pin 1.2V ECC Registered RDIMM module is built for Supermicro H12DSi-NT6, H12DSQ-NT6, H12DST-B, H12DSU-iN and H12DSU-iNR motherboards. It delivers 128GB capacity in one slot using JEDEC-standard DDR4 technology.

Suited for registered ECC server slots only

This memory fits workstations, servers and NAS systems that require DDR4 ECC Registered DIMMs. It will not work in standard desktop computers that use unbuffered non-ECC memory. Builders needing load-reduced ECC or unbuffered modules should look elsewhere.

8Rx4 rank decides platform compatibility

The 8Rx4 organisation determines whether the motherboard memory controller can address this module. Supermicro H12DSi-NT6 and the listed H12 series boards support this rank structure; systems limited to lower rank counts cannot use it.

How it compares

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

Price $722.99
Pricier than about 56% 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 $5.65 per GB
Cheaper than about 69% 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 systemsSupermicro Motherboard H12DSi-NT6
Supermicro Motherboard H12DSQ-NT6
Supermicro Motherboard H12DST-B
Supermicro Motherboard H12DSU-iN
Supermicro Motherboard H12DSU-iNR

Questions about this item

What motherboard do I need to run this 128GB DDR4 3200 ECC RDIMM?

It is validated for Supermicro H12DSi-NT6, H12DSQ-NT6, H12DST-B, H12DSU-iN and H12DSU-iNR motherboards.

Can I keep my existing 2666MHz DDR4 ECC registered modules and add this 3200MHz kit?

Yes, the module is backward compatible with 2133, 2400, 2666 and 2933MHz speeds, but all DIMMs must be ECC registered — not unbuffered or load-reduced.

How do I confirm the DIMM is running at 3200MHz CL22 after installation?

Check the BIOS memory information or use a tool such as dmidecode; it should report DDR4-3200, PC4-25600, CAS latency 22 and 1.2V operation.

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