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OWC Atlas Pro 240GB CFexpress 4.0 Type A memory card

OWC

OWC Atlas Pro 240GB CFexpress 4.0 Type A Memory Card OWCCFXA4P00240

SKU CH-A22H-4SSHS MPN OWCCFXA4P00240

A 240 GB CFexpress 4.0 Type A card delivering up to 1850 MB/s read and 1700 MB/s write speeds

  • Total capacity240 GB
  • Max read speed1,850 MB/s
  • Write throughput1,700 MB/s
  • Product typeCFexpress 4.0
  • Capture fast-action bursts with 1700 MB/s write speed
  • Transfer large media files quickly via 1850 MB/s read speed
  • Store extended 4K footage on 240 GB capacity
  • Leverage CFexpress 4.0 Type A interface for high throughput
  • Reliable performance for professional video and photo workflows

Atlas Pro 240GB CFexpress 4.0 Type A

The OWC Atlas Pro is a 240 GB CFexpress 4.0 Type A memory card built for cameras and recorders that accept the Type A form factor. It delivers maximum read speeds of 1850 MB/s and maximum write speeds of 1700 MB/s for high-bitrate video and burst shooting.

Installation and common issues

Insert the card into a compatible CFexpress Type A slot until it clicks; the keyed design prevents incorrect orientation. The most frequent issue is using the card in a CFexpress Type B or XQD slot, which are physically and electrically incompatible and will not recognise the card.

CFexpress 4.0 Type A practical limits

The CFexpress 4.0 Type A interface uses two PCIe 4.0 lanes, capping theoretical throughput near 4 GB/s, so real-world speeds remain well below that ceiling. Sustained write performance can drop under thermal load or when the card nears full capacity, and older firmware in some cameras may limit the card to lower speeds.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $177.99
Pricier than about 84% of the 1,947 comparable items (median $46.99).
Total capacity 240 GB
Higher than about 79% of the 1,132 comparable items (median 64 GB).
Price per TB $741.63 per TB
Pricier than about 77% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameOWC
Model nameOWCCFXA4P00240
Part numberOWCCFXA4P00240
Total capacity240 GB
Product typeCFexpress 4.0
Performance
Max read speed1,850 MB/s
Write throughput1,700 MB/s
Size & build
Shipping weight0.06 kg
Package size53 × 43 × 10 mm

Questions about this item

How do I confirm the card delivers 1850 MB/s read and 1700 MB/s write after setup?

Use a CFexpress 4.0 Type A reader and run a benchmark tool such as CrystalDiskMark or Blackmagic Disk Speed Test; sustained sequential results near 1850 MB/s read and 1700 MB/s write indicate the card is performing to spec.

What accessories are included with the OWC Atlas Pro 240GB CFexpress 4.0 Type A card and what must I buy separately?

The package contains only the memory card; a compatible CFexpress 4.0 Type A reader and any required cables are sold separately.

Which capacity of the OWC Atlas Pro CFexpress 4.0 Type A line should I choose for my workflow?

The 240 GB model suits lighter workloads or as a secondary card; higher-capacity versions in the same series are better for extended high-bitrate recording.

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