Head-to-head · Best Cfexpress Type B Cards

OWC Atlas Pro CFexpress 4.0 Type B (512GB) vs SanDisk Pro-Cinema CFexpress Type B (320GB)

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

Verdict is reader-supported. As an Amazon Associate we earn from qualifying purchases. Some links on this page are affiliate links — if you click through and buy, we may earn a small commission at no extra cost to you. Our ratings are sourced from independent publications, not sponsors.

The short answer

OWC Atlas Pro CFexpress 4.0 Type B (512GB) comes out ahead by a narrow margin (4.5 vs 4.3). OWC Atlas Pro CFexpress 4.0 Type B (512GB) is best for: video-first hybrid creators. Read the strengths below before deciding.

Higher ratedRanked #3 in Best Cfexpress Type B Cards

OWC Atlas Pro CFexpress 4.0 Type B (512GB)

4.5

1 source$399.99as of Nov 3

The OWC Atlas Pro CFexpress 4.0 Type B memory card delivers exceptional performance with peak write speeds up to 3,000MB/s and read speeds up to 3,650MB/s, making it ideal for professional photographers and filmmakers capturing 6K video or shooting at high frame rates. It offers robust durability against environmental challenges and supports sustained write speeds up to 800MB/s, though its $399.99 price point and requirement for a separate USB4 reader for full performance may deter some users.

Strengths

— Delivers peak write speeds up to 3,000MB/s and read speeds up to 3,650MB/s
— Supports sustained write speeds up to 800MB/s for professional workflows
— Durable design resistant to shocks, drops, extreme temperatures, UV rays, and X-rays

Watch-outs

— Expensive, priced at $399.99 for the 512GB model

$399.99 · Check Price on Amazon Full review →

Ranked #4 in Best Cfexpress Type B Cards

SanDisk Pro-Cinema CFexpress Type B (320GB)

4.3

1 source

SanDisk's Pro-Cinema is a CFexpress 2.0 Type B card built around a 1400MB/s minimum sustained write speed, which earns it VPG400 certification. Digital Camera World benchmarked it at 1646MB/s read and 1441MB/s write, close to the 1700/1500MB/s SanDisk claims, and recorded 6K 60p RAW on a Nikon Z6 III without dropped frames. It comes in only 320GB and 640GB, and the outlet found it relatively expensive.

Strengths

— Benchmarked at 1646MB/s read and 1441MB/s write by Digital Camera World, close to SanDisk's claims
— 1400MB/s minimum sustained write speed with VPG400 certification
— Recorded 6K 60p RAW on a Nikon Z6 III with no glitches or dropped frames

Watch-outs

— Only two capacities, 320GB and 640GB
— Relatively expensive next to similarly quick cards, per Digital Camera World
— Peak speeds are well short of CFexpress 4.0 cards

Buy at sandisk.com Full review →

How they stack up

OWC Atlas Pro CFexpress 4.0 Type B (512GB)

The OWC CF Exp B 4.0 512 GB card delivers peak write speeds up to 3000 MB/s, double the SanDisk Pro-Cinema's 1500 MB/s peak write rating, though its 800 MB/s sustained write figure is below the Pro-Cinema's 1400 MB/s minimum. Its 3650 MB/s read and 3000 MB/s write ratings are roughly twice the 1750 MB/s and 1300 MB/s listed for the Lexar Professional SILVER, a CFexpress 2.0 card.

SanDisk Pro-Cinema CFexpress Type B (320GB)

The Pro-Cinema and the Lexar Professional SILVER are the two CFexpress 2.0 cards on this page. The Pro-Cinema's rated 1700MB/s read and 1500MB/s write are close to the Lexar's 1750MB/s and 1300MB/s, and about half the 3650MB/s and 3000MB/s listed for the two OWC CFexpress 4.0 cards. Its 1400MB/s minimum sustained write rating is higher than the 800MB/s sustained figure listed for the OWC Atlas Pro and the 480MB/s listed for the Lexar SILVER.

Specs side-by-side

Spec	OWC Atlas Pro CFexpress 4.0 Type B (512GB)	SanDisk Pro-Cinema CFexpress Type B (320GB)
Capacity	512GB	320GB (also 640GB)
Read Speed	3,650MB/s	Up to 1700MB/s
Write Speed	3,000MB/s	Up to 1500MB/s
Sustained Write Speed	up to 800MB/s	1400MB/s minimum
Interface	CFexpress 4.0	CFexpress 2.0
Card Type	CFexpress Type B	CFexpress Type B
Warranty	3-Year OWC Limited Warranty	—
Sustained Write	800 MB/s	—
Certification	—	VPG400

← See the full ranking of best cfexpress type b cards