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Two green 288-pin DDR4 LRDIMM modules, no heat spreaders

OWC

OWC 256GB (2x128GB) DDR4 3200 CL22 ECC LRDIMM Memory Upgrade Kit

SKU CH-3NG4-TMKV9

256GB dual-module DDR4 3200 ECC LRDIMM kit with CL22 timing, 1.2V operation and 4Rx4 rank for Supermicro H12SSL and H12SSW motherboards

  • Capacity256GB (2 x 128GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes

Capacity 256GB (2 x 128GB)

Struck-through versions exist but are not stocked here.

  • ECC load-reduced design protects data integrity in servers
  • 256GB kit (2 × 128GB) expands memory capacity for heavy workloads
  • DDR4 3200 CL22 at 1.2V delivers high bandwidth with low latency
  • Validated for Supermicro H12SSL-CT, H12SSL-NT, H12SSW-iNR and H12SSW-NTR
  • Backward compatible with 2133, 2400, 2666 and 2933MHz systems

Server-grade ECC LRDIMM kit

This OWC kit delivers 256GB of DDR4 3200 memory in two 128GB load-reduced DIMMs. It is built for Supermicro H12SSL and H12SSW motherboards that require registered ECC modules with a 4Rx4 organisation. The 1.2V modules operate at PC4-25600 with CL22 latency and include no heat spreader.

Replaces lower-capacity registered ECC DIMMs

The kit upgrades systems currently running smaller LRDIMM populations or mixed registered ECC configurations that the platform cannot support. The jump is worth it when the workload demands the full 256GB addressable space and the motherboard's memory controller is qualified for 4Rx4 load-reduced modules at 3200MT/s.

256GB headroom for virtualisation and large datasets

The capacity comfortably handles dense virtual-machine hosting, in-memory databases and multi-threaded compute jobs that exceed 128GB. It runs out when the platform's maximum supported memory per socket or per channel is lower than the installed 256GB, or when the application set grows beyond the physical limit of the two-slot kit.

Highlights

  • ECC load-reduced design protects data integrity in servers
  • 256GB kit (2 × 128GB) expands memory capacity for heavy workloads
  • DDR4 3200 CL22 at 1.2V delivers high bandwidth with low latency
  • Validated for Supermicro H12SSL-CT, H12SSL-NT, H12SSW-iNR and H12SSW-NTR
  • Backward compatible with 2133, 2400, 2666 and 2933MHz systems

Specifications

BrandOWC
Part Number3L2D44R4256P
Capacity256GB (2 x 128GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo
Compatible SystemSupermicro Motherboard H12SSL-CT
Supermicro Motherboard H12SSL-NT
Supermicro Motherboard H12SSW-iNR
Supermicro Motherboard H12SSW-NTR

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will the 288-pin DDR4 LRDIMM modules fit the memory slots on my Supermicro H12SSL-NT motherboard?

Yes, the kit uses the standard 288-pin DDR4 LRDIMM form factor that matches the DDR4 slots on the listed Supermicro H12SSL and H12SSW motherboards.

What is the correct installation sequence for the two 128GB 4Rx4 modules to avoid a boot failure?

Install one module per CPU socket channel following the motherboard manual's population order; mixing these load-reduced DIMMs with unbuffered or registered ECC memory will prevent the system from posting.

When should I expect to replace the 1.2V DDR4 3200 CL22 modules in a 24/7 server workload?

The modules are rated for continuous server operation with no scheduled replacement interval; replace only if diagnostics report correctable ECC errors rising above threshold or a module fails completely.

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