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 black DDR4 UDIMM sticks without heat spreaders

OWC

OWC 256GB (8x32GB) DDR4 2933MHz ECC Unbuffered UDIMM CL21 desktop RAM

SKU CH-CQWN-JCJR0

Eight 32 GB DDR4 modules with ECC run at 2933 MHz CL21 and 1.2 V for workstation and server upgrades

  • Capacity256GB (8 x 32GB)
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes
  • Buffered/RegisteredUnbuffered

Capacity 256GB (8 x 32GB)

  • 256 GB total capacity from eight 32 GB modules
  • ECC protection detects and corrects single-bit errors automatically
  • 2933 MHz DDR4 speed with CL21 latency for responsive workloads
  • 2 V operation reduces power draw and heat output
  • Backward compatible with 2133, 2400 and 2666 MHz systems

256GB DDR4 2933MHz ECC Kit

This OWC kit provides 256GB of DDR4 memory across eight 32GB unbuffered UDIMMs. It runs at 2933MHz with CL21 latency and includes error-correcting code for data integrity. The modules operate at 1.2V and use the standard 288-pin desktop form factor.

Check motherboard ECC support and slot count

Verify that your motherboard accepts unbuffered ECC UDIMMs and has eight available DDR4 slots. The kit is backward compatible with 2133MHz, 2400MHz and 2666MHz speeds if the platform cannot run at the rated 2933MHz. Ensure the BIOS is current for full capacity recognition.

Suited for workstations.

This 8-module kit targets users who require 256GB of ECC memory for virtualisation, large datasets or ZFS storage. Builds with fewer than eight slots, or systems that need registered memory, should look at different configurations. Non-ECC platforms cannot use the error-correction feature.

Highlights

  • 256 GB total capacity from eight 32 GB modules
  • ECC protection detects and corrects single-bit errors automatically
  • 2933 MHz DDR4 speed with CL21 latency for responsive workloads
  • 2 V operation reduces power draw and heat output
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Specifications

BrandOWC
Part Number2E9D42R8256K
Capacity256GB (8 x 32GB)
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
ColorBlack
Heat SpreaderNo
Recommend UseWorkstations, Servers, and NAS Systems
LED ColorNone

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

What comes in the 256GB kit and is anything else needed to install it?

The kit contains eight 32GB DDR4 2933MHz ECC unbuffered UDIMM modules. No extra parts are required; the DIMMs plug directly into 288-pin motherboard slots.

Should I choose this 8-module kit or a different capacity for my workstation?

Select this 8 x 32GB kit when you need the full 256GB capacity across eight slots. Choose a smaller kit if your board has fewer slots or your workload does not require that much memory.

What does the 2933MHz rating mean once the RAM is running in my server?

The modules operate at up to 2933MHz (PC4-23400) with CL21 latency at 1.2V. They will also run at 2666MHz, 2400MHz or 2133MHz if the platform only supports those speeds.

Also in this aisle

People compared these

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