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Eight green 288-pin DDR4 LRDIMM sticks in a row

OWC

OWC 512GB (8x64GB) DDR4 2400 CL17 4Rx4 288-pin 1.2V ECC LRDIMM memory upgrade

SKU CH-AY3W-A7B6G

Eight 64 GB DDR4 2400 ECC load-reduced DIMMs totalling 512 GB for Cisco UCS B420 M4 and C460 M4 servers

  • Capacity512GB (8 x 64GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes

Capacity 512GB (8 x 64GB)

  • 512 GB total capacity from eight 64 GB modules
  • ECC load-reduced design protects data integrity in servers
  • DDR4 2400 CL17 at 1.2 V for efficient performance
  • 288-pin LRDIMM form factor fits Cisco UCS B420 M4 and C460 M4
  • Backward compatible with 2133 MHz systems for flexible deployment

Cisco UCS B420 M4 / C460 M4 DDR4 memory kit

This OWC kit supplies 512 GB of DDR4 2400 CL17 ECC load-reduced DIMMs in eight 64 GB modules. The 288-pin LRDIMMs run at 1.2 V and carry a 4Rx4 organisation. They are qualified for Cisco UCS B420 M4 and C460 M4 servers using DDR4 memory. The kit replaces Cisco part UCSML1X644RVA.

Who this suits and who it does not

The modules are built for server and workstation platforms that require ECC load-reduced memory. They will not work in standard desktop computers. They also cannot be mixed with unbuffered or registered ECC DIMMs. Buyers needing non-ECC memory or a different form factor should look elsewhere.

Installation notes

Each DIMM installs in a standard 288-pin DDR4 slot; no special tools are required. The most common issue is attempting to combine these load-reduced modules with other memory types, which prevents the system from posting. Verify that all slots are populated with identical LRDIMMs before powering on.

Highlights

  • 512 GB total capacity from eight 64 GB modules
  • ECC load-reduced design protects data integrity in servers
  • DDR4 2400 CL17 at 1.2 V for efficient performance
  • 288-pin LRDIMM form factor fits Cisco UCS B420 M4 and C460 M4
  • Backward compatible with 2133 MHz systems for flexible deployment

Specifications

BrandOWC
Part Number2L4D44R4512K
Capacity512GB (8 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 B420 M4
Cisco UCS C460 M4 (DDR4)

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Questions about this item

Does this 512GB DDR4 2400 CL17 4Rx4 1.2V ECC LRDIMM kit require a Cisco UCS B420 M4 or C460 M4 server to operate?

Yes, the kit is validated for Cisco UCS B420 M4 and C460 M4 DDR4 platforms; other systems that accept 288-pin DDR4 ECC LRDIMM at 1.2V may work but are not confirmed.

Can I keep my existing 2133MHz DDR4 ECC LRDIMM modules and add these 2400MHz modules to the same Cisco server?

The modules are backward compatible with 2133MHz speeds, but LRDIMM cannot be mixed with unbuffered or registered ECC DIMMs; all slots must use load-reduced ECC.

How do I verify the 8x64GB 512GB kit is running at DDR4 2400 CL17 with ECC active after installation?

Check the server BIOS or management console: it should report 512GB total, 2400 MT/s, CL17 timings, 1.2V, and ECC load-reduced status for each of the eight DIMMs.

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