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OWC Atlas Ultra SDXC 256GB memory card, standard SD form factor, matte black finish

OWC

OWC Atlas Ultra SDXC 256GB V90 Memory Card OWCSDV90U0256

SKU CH-8BV3-ZE1EZ MPN OWCSDV90U0256

A UHS-II SDXC card delivering 256 GB capacity with 300 MB/s read and 250 MB/s write speeds, plus V90 sustained performance

  • Total capacity256 GB
  • Memory card formatFull Size SD
  • Speed classUHS-II / V90
  • Max read speed250 MB/S
  • Write throughput300 MB/S
  • Product typeSDXC
  • Sustained 90 MB/s write for 6K video capture
  • Real-world 300 MB/s read and 250 MB/s write speeds
  • IP67 dust-proof and waterproof durability
  • UHS-II V90 rated for professional cameras
  • Backwards compatible with older SD devices and readers

Professional media card

The OWC Atlas Ultra SDXC 256GB is a full-size SDXC card built for photographers and videographers who need reliable high-throughput capture. Its UHS-II interface and V90 rating support sustained write performance for demanding creative workflows.

Capacity and sustained throughput

The card offers 256GB of storage and delivers a minimum sustained write speed of 90MB/s, with real-world peaks up to 250MB/s write and 300MB/s read. This headroom handles high-bitrate 4K and 6K video plus extended RAW burst sequences before the buffer fills.

V90 speed class requirement

The V90 classification guarantees 90MB/s minimum sustained write, which is the deciding factor for cameras that require this rating for their highest video modes. Cards without V90 will drop frames or stop recording in those settings. Buyers whose cameras only need U3 or V30 will not benefit from the extra guaranteed headroom.

How it compares

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

Price $228.99
Pricier than about 88% of the 1,947 comparable items (median $46.99).
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $894.49 per TB
Pricier than about 82% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameOWC
Product lineAtlas Ultra SDXC
Part numberOWCSDV90U0256
Total capacity256 GB
Product typeSDXC
Performance
Speed classUHS-II / V90
Max read speed250 MB/S
Write throughput300 MB/S
Storage
Memory card formatFull Size SD
Connectivity
Wireless enabledNo
Size & build
Shipping weight0.05 kg
Package size53 × 44 × 10 mm

Questions about this item

Will the 250 MB/s read and 300 MB/s write speeds work with my older UHS-I card reader?

The card is backwards compatible with previous generation SD devices and readers, but speeds will be limited to the UHS-I interface maximum.

How can I verify the card is delivering the V90 rating after setup?

A sustained write speed of at least 90 MB/s during 4K or 6K video recording confirms the V90 minimum sustained write performance.

Does the package include a card reader or just the 256GB SDXC card?

Only the memory card is supplied; a compatible UHS-II reader must be purchased separately to achieve the 250 MB/s read and 300 MB/s write speeds.

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