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Two green circuit boards with gold edge connectors and black memory chips, no heat spreaders

OWC

OWC 128GB (2x64GB) DDR4 2400 CL17 4Rx4 288-pin 1.2V ECC LRDIMM Kit Cisco UCS B260 M4 B460 M4

SKU CH-XFH0-458XW

128 GB DDR4 2400 CL17 ECC load-reduced dual-rank kit for Cisco UCS B260 M4 and B460 M4 servers

  • Capacity128GB (2 x 64GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes

Capacity 128GB (2 x 64GB)

  • ECC load-reduced design protects data integrity in servers
  • 128 GB kit (2 × 64 GB) expands Cisco UCS B260 M4 and B460 M4 memory
  • DDR4 2400 CL17 at 1.2 V matches factory specifications
  • 4Rx4 288-pin LRDIMM modules install without mixing buffered types
  • Backward compatible with 2133 MHz systems for flexible deployment

Cisco UCS Server Memory Kit

This 128GB kit contains two 64GB DDR4 LRDIMM modules built for Cisco UCS B260 M4 and B460 M4 servers. Each module runs at 2400 MT/s with CL17 latency and operates at 1.2V. The load-reduced design reduces electrical load on the memory controller to support high-density configurations.

Sustained Load Behaviour

ECC load-reduced memory maintains data integrity during continuous server workloads by correcting single-bit errors on the fly. The 4Rx4 organisation allows the memory controller to address more ranks per channel without exceeding electrical limits. Backward compatibility with 2133 MT/s lets the kit run reliably if the platform downclocks under thermal pressure.

DDR4 LRDIMM Constraints

The DDR4 LRDIMM standard requires a compatible server chipset that supports load-reduced buffering; standard desktop or workstation boards will not recognise these modules. Mixing LRDIMMs with registered or unbuffered DIMMs in the same system is not supported. The 288-pin form factor fits only DDR4 slots wired for ECC load-reduced operation.

Highlights

  • ECC load-reduced design protects data integrity in servers
  • 128 GB kit (2 × 64 GB) expands Cisco UCS B260 M4 and B460 M4 memory
  • DDR4 2400 CL17 at 1.2 V matches factory specifications
  • 4Rx4 288-pin LRDIMM modules install without mixing buffered types
  • Backward compatible with 2133 MHz systems for flexible deployment

Specifications

BrandOWC
Part Number2L4D44R4128P
Capacity128GB (2 x 64GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B260 M4 E7 v4
Cisco UCS B460 M4 E7 v4

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Questions about this item

How much power does the 1.2V DDR4 2400 LRDIMM kit draw when the server runs continuously?

Each module operates at 1.2V; total power depends on the Cisco UCS B260 M4 or B460 M4 platform and workload, so consult the server's technical guide for exact figures.

What must the Cisco UCS B260 M4 or B460 M4 already have to accept this 2x64GB ECC LRDIMM kit?

The server must support DDR4 ECC Load Reduced DIMMs, provide 288-pin slots, and allow 4Rx4 modules; it cannot mix with unbuffered or registered ECC memory.

Will these 2400MHz CL17 modules run with older 2133MHz memory still installed in the Cisco UCS B260 M4 or B460 M4?

The kit is backward compatible with 2133MHz speeds, but all slots must use ECC Load Reduced DIMMs — mixing with registered or unbuffered memory is not supported.

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