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OWC Atlas Core 256GB CFexpress 4.0 Type B memory card, black rectangular card with gold contacts and silver label

OWC

OWC Atlas Core 256GB CFexpress 4.0 Type B memory card

SKU CH-4E6E-Z76AW

A 256 GB CFexpress 4.0 Type B card with 3571 MB/s read, 2227 MB/s write and VPG200 sustained performance for 4K and 8K compressed video

  • Read SpeedUp to 3571MB/s
  • Write SpeedUp to 2227MB/s
  • Up to 3571MB/s read speed accelerates file offloads
  • Up to 2227MB/s write speed handles RAW bursts and 8K compressed video
  • VPG200 certification guarantees 200MB/s sustained write across the full 256GB capacity
  • Innergize software provides free health checks, performance restoration and firmware updates
  • Resistant to impact, bending, shock, UV, ESD and x-rays for tough shoots

Essential Speed for Production

The OWC Atlas Core is a 256GB CFexpress 4.0 Type B memory card rated for up to 3571MB/s read and 2227MB/s write. It targets enthusiasts and working professionals who need reliable throughput for RAW bursts, 4K video and up to 8K compressed video. VPG200 certification guarantees sustained performance across the full capacity.

Upgrading from XQD Cards

Nikon DSLR owners using D5, D500 or D850 bodies can move from XQD media to this Type B card for faster offloads and higher sustained write headroom. The jump is worth it when your current cards bottleneck continuous shooting or 4K recording workflows. Canon R-series, Nikon Z and Panasonic S-series mirrorless shooters also gain a cost-effective speed tier.

CFexpress 4.0 Type B Limits

The card operates within the CFexpress 4.0 Type B electrical and mechanical specification, so it requires a compatible host slot and reader to reach rated speeds. Sustained write is specified at 368MB/s, which defines the practical floor for uninterrupted recording. Innergize software support depends on pairing the card with an OWC Atlas reader for health monitoring and firmware updates.

Highlights

  • Up to 3571MB/s read speed accelerates file offloads
  • Up to 2227MB/s write speed handles RAW bursts and 8K compressed video
  • VPG200 certification guarantees 200MB/s sustained write across the full 256GB capacity
  • Innergize software provides free health checks, performance restoration and firmware updates
  • Resistant to impact, bending, shock, UV, ESD and x-rays for tough shoots

Specifications

Read SpeedUp to 3571MB/s
Write SpeedUp to 2227MB/s

Questions about this item

Does the CFexpress 4.0 Type B form factor fit my Canon R-series mirrorless camera?

Yes, the Atlas Core is a CFexpress 4.0 Type B card designed for Canon R-series, Nikon Z, Panasonic S-series mirrorless cameras and Nikon DSLRs such as the D5, D500 and D850 that previously used XQD.

How do I install the card and what step do people often miss?

Insert the card into the camera's CFexpress Type B slot until it clicks; the step many miss is formatting the card in-camera before the first shoot to ensure the file system matches the camera.

What maintenance will the card need over its life?

Use the free Innergize software with an OWC Atlas reader to check health status, restore performance and apply firmware updates so the card stays reliable for RAW bursts and 8K compressed video.

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