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Eight black DDR4 UDIMM sticks without heat spreaders, 256GB total

OWC

OWC 256GB (8x32GB) DDR4 3200MHz ECC Unbuffered desktop RAM

SKU CH-S8X1-EKMZK

Eight 32 GB DDR4 3200 MHz ECC unbuffered DIMMs totalling 256 GB for workstations, servers and NAS systems

  • Capacity256GB (8 x 32GB)
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes
  • Buffered/RegisteredUnbuffered

Capacity 256GB (8 x 32GB)

  • 256GB total capacity from eight 32GB modules
  • 3200MHz DDR4 speed with CL22 latency
  • ECC error correction for data integrity
  • 2V low-voltage operation reduces power draw
  • Compatible with 2133, 2400, 2666 and 2933MHz systems

256GB DDR4 3200MHz ECC Kit

This OWC kit supplies 256GB of DDR4 memory across eight 32GB unbuffered UDIMMs rated at 3200MHz with CL22 latency and 1.2V operation. Each module carries ECC for data integrity and conforms to JEDEC PC4-25600 specifications. The 288-pin DIMMs are designed for workstation, server and NAS platforms that support unbuffered ECC memory.

Workstations, servers and NAS builds

Systems that require large-capacity error-correcting memory without registered modules will benefit from this configuration. Platforms limited to non-ECC or registered DIMMs, or those capped below 256GB total capacity, should consider alternative kits that match their memory controller requirements.

256GB capacity with 3200MHz headroom

The eight-module arrangement comfortably handles virtualisation, large datasets and multi-application workloads that demand high memory bandwidth. Performance scales down automatically to 2933MHz, 2666MHz, 2400MHz or 2133MHz when the platform dictates lower speeds. The practical limit is the motherboard's maximum unbuffered ECC capacity and slot count.

Points forts

  • 256GB total capacity from eight 32GB modules
  • 3200MHz DDR4 speed with CL22 latency
  • ECC error correction for data integrity
  • 2V low-voltage operation reduces power draw
  • Compatible with 2133, 2400, 2666 and 2933MHz systems

Caractéristiques

BrandOWC
Part Number3E2D42R8256K
Capacity256GB (8 x 32GB)
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
ColorBlack
Heat SpreaderNo
Recommend UseWorkstations, Servers, and NAS Systems
LED ColorNone

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Questions sur cet article

Does my motherboard need to support DDR4 ECC unbuffered 288-pin DIMMs at 1.2V for this 256GB kit to work?

Yes, the board must accept DDR4 ECC unbuffered UDIMMs at 1.2V and provide eight 288-pin slots; without ECC support the modules will not initialise correctly.

Will the eight 32GB modules run at 3200MHz CL22 if I keep older 2400MHz or 2666MHz sticks installed?

The kit is backward compatible with 2133MHz, 2400MHz, 2666MHz and 2933MHz, so mixed speeds will drop to the slowest installed frequency and loosest timings.

How can I verify the full 256GB is detected and ECC is active after installation?

Check the BIOS memory summary for 256GB total and ECC enabled, then confirm in the OS with a tool that reports ECC status such as dmidecode or CPU-Z.

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