OWC Atlas USB4 CFexpress 4.0 Type B card reader


OWC has launched its new Atlas USB4 CFexpress 4.0 Type B card reader which enables you to offload material at ultra-fast speeds. It also features broad compatibility and it is bus-powered.

Key Features

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  • Achieve real-world transfer speeds exceeding 3300MB/s
  • Capable of ingesting up to 5000MB/s
  • Enjoy maximum compatibility with USB4, Thunderbolt 4, and USB-C devices.
  • Benefit from its pocket-sized, bus-powered, and ultra-stable design.
  • Stay cool under pressure with its fanless thermally efficient design.
  • Enjoy the added bonus of Innergize health, performance, and field upgrade management tool.

Over 4x Faster Ingest Compared To USB 3.2 Readers

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Existing USB-C (10Gb/s) readers are reasonably fast, however, the new OWC Atlas USB4 CFexpress 4.0 Type B Card Reader can substantially reduce transfer times when coupled with OWC Atlas CFA 4.0 memory cards. With this combinationusers can achieve claimed real-world transfer speeds of over 3300MB/s.

Featuring a highly effective heat sink and heat-resistant internal components to prevent thermal throttling, the Atlas USB4 CFexpress 4.0 Type B Card Reader is the fastest and most reliable solution available for ingesting CFexpress 4.0 Type B media cards. It can also be used to get maximum speed from CFexpress 2.0 Type B cards. With automatic computer connection speed detection, it can delivers maximum performance.

The Atlas USB4 CFexpress 4.0 Type B card reader benchmarked speeds of 3346MB/s (read) and 2676MB/s (write) based on testing with OWC Atlas Ultra CFexpress 2TB card connected through a Thunderbolt 4 port on a Dell XPS 13 Evo Intel i5 4.4GHz and 8GB RAM, in Windows 11 Pro using CrystalDiskMark (1GB file size). Performance will vary depending on host hardware, software, usage, and media cards used.

Transfer Time Examples:

Types of FilesOWC Atlas USB4 CFexpress Type B ReaderOWC Atlas FXR CFexpress ReaderUSB 3.2 (10Gb/s) Reader
15,000 RAW 45 Megapixel images and 15,000 JPEG images with Canon R5C (approx. 1.02TB)6min 19sec11min 45 sec25min 11sec
68 mins of 6K Blackmagic BRAW video in Q0 compression at 30fps from BMPCC 6K Pro (approx. 1.02TB) 5min 38sec10min 46sec24min 23sec
23 minutes of 8K N-RAW HQ video at 60fps with Nikon Z9 (approx. 1.02TB)5min 51sec11min 02sec24min 10sec

The compact design of the Atlas USB4 card reader makes it a good solution for anyone who needs to travel. The aluminum enclosure is claimed to housescutting-edge technology like a highly effective new heat sink to prevent thermal throttling and ensure fast and reliable transfers.

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An Innergize switch enables users to fully leverage the capabilities of OWC Innergize software which can boost USB 3.2 transfer rates by over 30% compared to previous generation of USB 3.2 products.


The Atlas USB4 CFexpress card reader supports both CFexpress 4.0 Type B and 2.0 Type B cards at their maximum speed capabilities. It also works with USB4, USB 3, and Thunderbolt 4 and 3 on Mac, Windows, and Linux computers. Additionally, it is designed to work with iPads, iPhones, and Chromebooks.

Comprehensive assortment of hardware and software solutions

OWC has built a comprehensive assortment of hardware and software solutions to support anyone through the creative process from Capture to Completion. The OWC Atlas ecosystem is the first step of the process to ensure photographers/videographers have the tools they need.

OWC’s Innergize software is an integral part of the ecosystem built for OWC Atlas memory cards and readers. Innergize first checks the health of an Atlas card to ensure it is reliable to use, and then cleans and restores performance so there will be zero dropped frames when shooting video or continuous burst photos. Atlas owners can then upgrade their firmware in the field to take advantage of the latest card improvements and ensure OWC cards and readers will perform optimally with their cameras. 

Pricing & Availability

The OWC Atlas USB4 CFexpress Type B memory card reader is available for pre-order now starting at $99.99 USD on Macsales.com.

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