We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Eight green DDR4 registered DIMMs in static bags

OWC

OWC 256GB (8x32GB) DDR4 2400 PC4-19200 CL17 2Rx4 288-pin 1.2V ECC Registered RDIMM memory upgrade

SKU CH-MTZK-HYXDX

Eight 32 GB DDR4 2400 ECC registered RDIMMs totalling 256 GB for Cisco UCS C240 M4 servers

  • Capacity256GB (8 x 32GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes

Capacity 256GB (8 x 32GB)

  • 256 GB total capacity from eight 32 GB modules
  • DDR4 2400 speed with PC4-19200 bandwidth for server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in dense configurations
  • Qualified replacement for Cisco UCS C240 M4 part numbers

Server-grade DDR4 ECC RDIMM kit

This OWC kit provides 256GB of DDR4 2400 PC4-19200 ECC Registered memory across eight 32GB modules. It is built for the Cisco UCS C240 M4 server and other compatible workstation or NAS platforms that require registered DIMMs. The CL17 latency and 1.2V operation match the platform specifications. Buyers needing unbuffered desktop memory cannot use this product.

Replaces Cisco HXMR1X322RVA and related part numbers

The kit directly substitutes Cisco part numbers HXMR1X322RVA, HXSPM32RVA, UCSMR1X322RVA, UCSMR1X322RVARF and UCSMR1X322RVAS. It is a drop-in upgrade when the server currently uses registered ECC DDR4 2400 modules and the memory slots support 2Rx4 32GB density. The jump is worth it when expanding total capacity or replacing failed sticks with a matched set of eight.

Verify registered ECC support

Confirm the target system requires 288-pin DDR4 Registered ECC RDIMMs and does not use load-reduced or unbuffered memory, as mixing types is not supported. Check the motherboard documentation for maximum capacity per channel and the required population order for eight modules. Ensure the BIOS version supports 32GB 2Rx4 density before ordering.

Highlights

  • 256 GB total capacity from eight 32 GB modules
  • DDR4 2400 speed with PC4-19200 bandwidth for server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation reduces power draw in dense configurations
  • Qualified replacement for Cisco UCS C240 M4 part numbers

Specifications

BrandOWC
Part Number2R4D42R4256K
Capacity256GB (8 x 32GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemCisco UCS C240 M4

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 RDIMM modules fit the Cisco UCS C240 M4 memory slots?

Yes, the kit contains eight 32GB DDR4 2400 CL17 2Rx4 1.2V ECC registered RDIMMs built to the 288-pin standard used by the Cisco UCS C240 M4.

What is the correct order to install the eight 32GB RDIMMs in the Cisco UCS C240 M4?

Populate the DIMM slots in the sequence shown in the Cisco UCS C240 M4 service guide, filling each channel evenly; the step often missed is matching identical 2Rx4 modules per channel for optimal performance.

When should the ECC registered RDIMMs be replaced in a Cisco UCS C240 M4?

Replace modules only if the system logs correctable ECC errors that exceed the platform threshold or if a DIMM fails POST diagnostics; the JEDEC-compliant DDR4 parts have no scheduled replacement interval.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.