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OWC Atlas Ultra SDXC 256GB SDXC Flash Memory
- Ultra-speed: up to 250MB/s write and 300MB/s read real-world speeds for the most advanced use cases of professional content creators including high burst image sequence RAW photography and high bitrate 4K and 6K video recording
- Dependable: delivers 90MB/s minimum sustained write speed
- Proven: extended time tested in highest settings of high-end cameras
- Tough: bend/shock/X-ray resistant and IP67 dust-proof and waterproof
- Supportive: fully compatible with a wide variety of DSLR and mirrorless cameras
- Flexible: backwards compatible with previous generation of SD devices and readers
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Learn more about the Detailed Specifications
| Brand | OWC |
|---|---|
| Card type | Full Size SD |
| Series | Atlas Ultra SDXC |
| Part Number | OWCSDV90U0256 |
| Type | SDXC |
| Wireless Enabled | No |
|---|---|
| Capacity | 256GB |
| Speed Class Rating | UHS-II / V90 |
| Read Speed | 250 MB/S |
| Write Speed | 300 MB/S |
| First Listed on Newegg | June 14, 2023 |
|---|
Warranty & Returns
Warranty, Returns, And Additional Information
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.com's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-800-275-4576
- Support Email: slabus@macsales.com
- Support Website
- View other products from OWC
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The OWC Atlas Ultra is a 256GB, full-size SDXC UHS-II V90 memory card for professional photographers and videographers who need dependable storage for burst RAW photography and high-bitrate 4K or 6K recording; it provides a minimum sustained write speed of 90MB/s.
Recommended For
- Photographers using a compatible UHS-II camera for sustained RAW bursts—such as action, sports, or wildlife shooting—who want a V90 card suited to demanding capture settings.
- Videographers whose camera manual calls for V90 media for a specific high-bitrate mode, such as some All-Intra or high-frame-rate 4K recordings; confirm the camera’s requirements, since supported modes vary by model.
- Outdoor and field photographers or video crews who want SD storage with IP67 dust- and water-resistance, plus bend, shock, and X-ray resistance, when swapping or carrying cards in demanding conditions.
- Camera owners who need a full-size SDXC card for a supported high-end DSLR or mirrorless body and want 256GB of capacity for photo or video shoots that produce substantial files.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Photographers and video creators using full-size SDXC devices, with UHS-II/V90 speed-class support and 256GB of storage |
| Capacity | 256GB of flash storage |
| Card Format And Compatibility | Full-size SDXC card with UHS-II interface; compatible with computers and other SDXC devices, with no wireless connectivity |
| Speed And Performance | UHS-II / V90 and Class 10 ratings; listed read speed is 250 MB/s, write speed is 300 MB/s, and media speed is 90 MB/s |
| Physical Specifications | Approximately 1.3 × 0.9 inches; listed weight is 0.01 kg |
| Model Identifiers | OWC Atlas Ultra SDXC, also identified as Atlas Ultra SD V90; part/model number OWCSDV90U0256 |