Designed for capturing raw 8K, 6K, and 4K video, the 800GB CFexpress 4.0 Type B Iridium Memory Card from ProGrade Digital provides read speeds of up to 3550 MB/s, which helps to quickly offload content to your computer, and write speeds of up to 3000 MB/s. Additionally, the Iridium delivers sustained write speeds of 1500 MB/s and, thanks to its VPG-400 rating, minimum write speeds that are guaranteed to not drop below 400 MB/s.

800GB Storage Capacity    Max Read Speed: 3550 MB/s    Max Write Speed: 3000 MB/s    Sustained Write Speed: 1500 MB/s    Min Write Speed: 400 MB/s    Records Raw 8K, 6K, and 4K Video    Optimized for Express Transfers    Refresh Pro Ready

• Max Read Speed: 3550 MB/s
• Max Write Speed: 3000 MB/s
• Sustained Write Speed: 1500 MB/s
• Min Sustained Write Speed: 400 MB/s
• Records raw 8K, 6K, and 4K video
• Refresh Pro ready

Related Questions and Answers

Q: 1. Is the cfexpress 4.0 card compatible with the Sony a7iv?

A: Yes. The ProGrade Digital 960GB CFexpress 4.0 Type A Iridium Memory Card is compatible wiht the Sony A74 camera.

Q: 2. Build quality?

A: The ProGrade Digital 512GB CFexpress 4.0 Type B Gold Memory Cards are not ruggedized and need to be kept safe from the elements.

Q: 3. Is this card compatible with Nikon Z9 camera? Can the full card's potential be used with the Z9?

A: This card is fully compatible with the Nikon Z9. However, it can't use the CFexpress 4.0 speeds yet.

Q: 4. Are these compatible with the Sony Burano?

A: Yes, the ProGrade Digital 2TB CFexpress 4.0 Type B Gold Memory Card (2-Pack) are compatible with the Sony BURANO 8K Digital Motion Picture Camera.

Q: 5. Is this card compatible with the Hasselblad X2D 100C?

A: Yes. The ProGrade Digital 1TB CFexpress 4.0 Type B Gold Memory Card is compatible with the Hasselblad X2D 100C camera.

Q: 6. What is better in terms of cooling? This or SanDisk PRO-CINEMA CFexpress Type B Memory Card? I’m planing to record internal raw videos on my Nikon Z8

A: The ProGrade Digital 1.6TB CFexpress 4.0 Type B Iridium Memory Card has a a metal construction, for cooling.

Q: 7. Is this card compatible with the Sony a7s3?

A: Yes, the ProGrade Digital 960GB CFexpress 4.0 Type A Iridium Memory Card is compatible with the Sony a7S III Mirrorless Camera.

Q: 8. Would using these vs.UHS-II help with heating issues on the Sony A74 due to the faster speeds of CFexpress Type A?

A: Yes, the ProGrade Digital 480GB CFexpress 4.0 Type A Iridium Memory Card has faster read and write speeds than a UHS-II SDXC Memory Card, so less heat will be generated in the Sony a7 IV Mirrorless Camera.

Q: 9. What is the sustained write speed when using this card on a 3.0 bus camera?

A: At this time, no tests have been conducted using the ProGrade Digital 960GB CFexpress 4.0 Type A Iridium Memory Card with a camera that has a 3.0 bus.

Q: 10. How does it hold up with the temperature when recording in raw video internally using Nikon Z8

A: The operating and storage temperatures' for the ProGrade Digital 1.6TB CFexpress 4.0 Type B Iridium Memory Card (2-Pack), BH #PRCFX16002BH are operating temperature: -12°C to 72°C and storage temperature: -20°C to 85°C.