OWC Atlas Ultra CFexpress

High-performance, highest quality memory card for the most demanding video recording uses of professional filmmakers and continuous burst mode shooting by advanced photographers.

OWC Altas Ultra CFexpress Memory Card Lineup

Up to Guaranteed Minimum


Sustained Write Speed

Compatible with



Up to


Video Recording

Ultimate Continuous


Photo Shoots


CFexpress 2.0 Type B

Only $289.99


CFexpress 2.0 Type B

Only $449.99


CFexpress 4.0 Type B

Only $479.99


CFexpress 4.0 Type B

Only $679.99

The Fastest, Most Reliable CFexpress Card

When you need the fastest, most reliable CFexpress card, the Atlas Ultra CFexpress is ready to take you to the edge. With incredibly high minimum sustained write speeds up to 1500MB/s, this is the perfect media card for pro filmmakers or extreme action photographers to unleash their cameras capabilities.

Professional filmmakers can capture amazingly life-like 8K RAW video in slow-motion with cinema cameras like the Nikon Z9, Canon R5C, and RED V-Raptor. As a testament to its quality, the Atlas Ultra CFexpress is one of only several media cards that meets RED Digital Cinema’s stringent test standards and has been officially approved for use with their RED V-Raptor Cinema camera.

Compatibility You Can Count On

compatible, but not at highest resolution settings
256GB OWC Atlas Pro CFexpress Memory Card
2TB OWC Atlas Pro CFexpress Memory Card
560GB OWC Atlas Ultra CFexpress Memory Card
2.0TB OWC Atlas Ultra CFexpress Memory Card

Atlas Pro

Atlas Pro

Atlas Ultra

Atlas Ultra



256GB - 512GB

325GB - 650GB

1.0TB - 2.0TB


CFexpress 2.0

CFexpress 4.0

CFexpress 2.0

CFexpress 4.0

Max sequential read





Max sequential write





Min sustained write





Blackmagic Cinema 6K

Canon C300 Mark III

Canon C500 Mark III

Canon 1DX Mark III

Canon EOS R3

Canon EOS R5

Canon EOS R5C

Fujifilm X-H2 / X-H2S

Fujifilm GFX100 II

Nikon Z9

Nikon Z8

Nikon Z6 / Z7

Nikon Z6 II / Z7 II

Nikon D500

Nikon D850

Nikon D5

Nikon D6

Panasonic GH6

Panasonic S1 / S1R

PhaseOne XF IQ4




RED Approved RED Approved


RED Approved RED Approved


Sony Burano

Quality In = Quality Output

Thanks to an extremely thorough quality control process, you can work fearlessly knowing that your Atlas Ultra CFexpress card will flawlessly deliver the speed and data integrity you need when you only have one chance to capture the moment. Quality in, quality output. The Atlas Ultra CFexpress is the difference-maker for your high-end workflows and maximum camera setting uses.


Up to 3000MB/s write and up to 3650MB/s read real-world speeds for the most advanced use cases including fast burst RAW image sequences and high-bitrate video recording up to 8K1


Delivers up to 1500MB/s minimum sustained write speed


Fully compatible with a wide variety of DSLR, mirrorless, and cinema cameras


Fully compliant up to CFexpress 4.0 Type B specification and meets CFexpress 1.0 and 2.0 specifications


Impact, bend, shock, ESD, UV ray, and x-ray resistant


3 Year OWC Limited Warranty

Shoot, Store, and Swap… Anywhere

Atlas Ultra CFexpress cards can shrug off the toughest environmental challenges, including x-rays, UV rays, shocks, drops, and extreme temperatures. Go ahead…shoot, store, and swap with total peace of mind. Atlas Ultra CFexpress cards have your work – and your back – well protected.

Production cart

Who is it for?

  • Advanced action sports photographers
  • Advanced outdoor/wildlife photographers
  • Professional video content creators
  • Film production companies
  • Feature film studios

What is it for?

  • Capturing a snowboarder doing an aerial trick
  • Capturing a loon landing on a lake
  • Branded, huge following influencers needing to create enhanced, professional-looking content for their channels
  • Capturing highest quality footage for a blockbuster movie
OWC Altas Ultra CFexpress Memory Card Lineup

Truth in Numbers

Up to


Write Speed

Up to


Read Speed

Up to Guaranteed Minimum


Sustained Write Speed

Big theoretical performance numbers are certainly eye-catchers, but they are misleading when your workflow requires real-world speed. That’s why we take the extra time to run OWC flash storage solutions through intensive performance testing, and we share our test setup and parameters. Truthfully listing Atlas Ultra CFexpress cards for reliable peak performance up to 3000MB/s write, 3650MB/s read, and up to 1500MB/s sustained write speed defines our commitment to the “OWC Difference,” which ensures these CFexpress Type B cards will deliver the performance you are counting on.

Maximum Sequential and Sustained Read/Write Performances delivered by OWC Atlas Ultra CFexpress 4.0 Cards

Details matter when it comes to making an investment into a memory card for your camera. That is why OWC Atlas Ultra CFexpress 4.0 cards leverage the CFA 4.0 specification that is backward compatible with CFA 2.0 (i.e. PCIe Gen3) cameras and readers of today, and forward compatible with CFA 4.0 (i.e. PCIe Gen4) cameras and readers of the future delivering the highest performance that you deserve.

OWC Atlas Ultra CFexpress Memory Card + OWC Atlas FXR Reader - Speed test screenshots

Over 3700MB/s and 3100MB/s sequential read and write and 3300MB/s and 1500MB/s sustained read and write performance from a 1TB Atlas Ultra CFexpress 4.0 card measured on a Windows 11 computer with AMD Ryzen 9 processor mounted on a Gigabyte Technology x570 Aorus Master motherboard with 32GB of RAM.

OWC Innergize - Photographer on mountaintop

Innergize Your Workflow with Highest Performance and Reliability

OWC Innergize™ is the first stage of the Capture to Completion™ ecosystem of OWC products designed to seamlessly propel professional photographers, videographers, and content creators to the highest level of workflow performance and reliability. This OWC custom-designed app is a complete health, performance, and field upgrade management tool when using OWC Atlas memory cards with OWC Atlas readers and reader equipped products.

Learn More

Work with Maximum Confidence and Reliability

OWC Innergize - Health


Over time and use cycles, flash memory does wear out. Innergize verifies and reports the percentage of use life remaining. Now you can work with full confidence your OWC flash memory product will deliver the reliability you can trust.

OWC Innergize - Sanitize


Writes, deletes, and formatting all take their toll on memory cards. Innergize cleans and restores the flash memory performance of OWC memory cards so you can get the best results on every use.

OWC Innergize - Field Upgrade

Field Upgrade

When new cameras or firmware updates to existing cameras are introduced, they may not work properly with flash memory cards and drives. Innergize gives OWC memory card users the ability to quickly upgrade their firmware in the field for full compatibility, additional performance enhancements, and bug fixes for optimal reliability.

OWC, Trusted by Pros & Enthusiasts the World Over

OWC, Trusted by Pros & Enthusiasts the World Over

We build our hardware to the highest standards of reliability and performance. Because 100% reliability is always the goal, we rigorously quality test and back our hardware with a 3 Year OWC Limited Warranty and award-winning customer support.

Learn More
  1. Up to 3000MB/s write / up to 3650MB/s read peak performance was observed based on testing OWC Atlas Ultra CFexpress cards in an Ableconn PEX-CF106 Adapter Card in a Gigabyte Aorus Master X570 motherboard with an AMD Ryzen 9 5950X 4.9GHz CPU and 32GB RAM, in Windows 10 Pro using Crystal Disk Mark (1GB file size). Sustained write speeds up to 1500MB/s were observed. Performance will vary depending on host hardware, software, usage, and Atlas Ultra CFexpress card used.