ProGrade Digital Iridium Series CFexpress Type-B 4.0 Memory Card – 3550MB/s Read, 3000MB/s Write, VPG400 Sustained Speed for 8K Video & Professional Workflows

The moment you press record, there is no second chance. The ProGrade Digital Iridium Series CFexpress Type-B 4.0 memory card is built for creators who refuse to compromise, delivering uncompromising speed, rock-solid reliability, and professional-grade endurance in a true CFexpress Type B 4.0 card engineered for next-generation cameras. Designed on a cutting-edge PCIe 4.0 CFexpress Type B card architecture with NVMe 1.4c technology, this CFexpress 4.0 memory card unleashes blistering performance of up to 3550MB/s read speed and 3000MB/s write speed, making it one of the fastest CFexpress Type B 4.0 memory card options available today. With sustained write speeds reaching 1500MB/s (800GB and 1.6TB models) and 850MB/s (400GB model)—and a guaranteed VPG400 minimum sustained write of 400MB/s—this high-speed CFexpress card ensures flawless RAW bursts, uninterrupted 4K video recording, and smooth 8K video capture, making it the best CFexpress Type B 4.0 card for 8K video and high-bitrate workflows.

Whether you shoot with Sony, Canon, or Nikon, this CFexpress Type B 4.0 card for Sony / Canon / Nikon mirrorless and cinema systems delivers the sustained throughput required for demanding codecs and high-frame-rate production, positioning it as a top-tier CFexpress card for video and an elite CFexpress card for photography. The rugged metal enclosure enhances thermal conductivity and durability, while built-in thermal throttling actively protects your data during long commercial shoots, outdoor productions, and high-temperature environments—making it a truly rugged CFexpress Type B memory card and a reliable CFexpress card for commercial shoots. With operating temperatures ranging from -12°C to 72°C, storage tolerance from -20°C to 85°C, shock resistance up to 50G, vibration resistance up to 15G acceleration, X-ray protection, SMART monitoring, sanitize functionality, and ultra-low power states down to <2mW in PS4, the Iridium CFexpress isn’t just fast—it’s engineered for mission-critical reliability.

Available in 400GB, 800GB, and 1.6TB capacities, this Professional CFexpress memory card gives filmmakers and photographers the storage headroom needed for extended takes and high-resolution stills without constant card swaps. Backward compatible with CFexpress 2.0 devices yet optimized for next-gen workflows, the ProGrade CFexpress platform pairs perfectly with high-speed readers for rapid offloads, dramatically reducing downtime between shoots and maximizing productivity. If you’re comparing options like the ProGrade Digital Iridium vs Cobalt CFexpress comparison, the Iridium Series memory card strikes a powerful balance between elite sustained speeds and long-term durability, making it the ideal ProGrade Iridium CFexpress card for professional videographers who demand performance without compromise.

For creators researching a ProGrade Iridium CFexpress 4.0 review or checking the ProGrade Digital CFexpress Type B 4.0 price, this High-speed CFexpress 4.0 card stands out as a future-ready investment for serious production environments and high-resolution workflows. When you need a fast CFexpress card for mirrorless cameras, a CFexpress 4.0 card for cinema cameras, or a dependable camera memory card that protects every frame, every sequence, and every client deliverable, the ProGrade Iridium 4.0 card delivers performance you can trust under pressure.

Don’t risk dropped frames, buffering delays, or corrupted footage—upgrade to a true Professional memory card built for speed, endurance, and serious creators. Buy ProGrade Iridium CFexpress Type B 4.0 today and experience uncompromising performance on your next shoot.

Product Benefits:

• Capture Every Critical Moment Without Fear – Record ultra-high bitrate 4K and 8K footage confidently with sustained write speeds up to 1500MB/s, eliminating dropped frames and buffering anxiety during once-in-a-lifetime shots.
• Finish Shoots Faster, Deliver Projects Sooner – Offload massive files at up to 3550MB/s read speed, dramatically reducing transfer time so you can meet tight client deadlines and boost productivity.
• Shoot Longer Without Interruptions – Choose from 400GB, 800GB, or 1.6TB capacities to minimize card swaps and stay fully immersed in your creative flow during commercial productions or long-form events.
• Trust Your Footage in Extreme Conditions – Operate confidently in temperatures from -12°C to 72°C, with shock resistance up to 50G and vibration resistance up to 15G, protecting your work in demanding environments.
• Protect Your Investment with Intelligent Thermal Control – Built-in thermal throttling and a rugged metal enclosure actively manage heat, preserving performance during extended high-resolution recording.
• Guarantee Professional-Grade Video Stability – VPG400 certification ensures a minimum sustained write speed of 400MB/s, delivering reliable performance for RAW, LOG, and high-frame-rate video capture.
• Maximize Camera Performance – Built on PCIe 4.0 and NVMe 1.4c, this CFexpress Type B 4.0 card unleashes the full potential of modern Sony, Canon, and Nikon mirrorless and cinema cameras.
• Reduce Risk of Data Loss – SMART monitoring and sanitize functionality provide advanced health management, giving you peace of mind on high-budget or mission-critical shoots.
• Work Smarter, Not Harder – Backward compatible with CFexpress 2.0 devices while optimized for CFexpress 4.0 systems, ensuring long-term usability and future-ready performance.
• Win More Clients with Reliable Results – Deliver flawless footage consistently, build trust with clients, and position yourself as a true professional with a memory card engineered for serious creators.

Features:

PCIe 4.0 Performance with NVMe 1.4c Architecture

At the core of the ProGrade Digital Iridium Series CFexpress Type-B 4.0 memory card is a next-generation PCIe Gen4 x2 interface paired with NVMe 1.4c technology, delivering dramatically higher bandwidth compared to previous CFexpress generations. This advanced architecture allows the card to reach up to 3550MB/s read speeds and 3000MB/s write speeds, enabling lightning-fast file transfers and seamless high-bitrate recording. For professionals working with RAW image bursts or cinema-grade codecs, this isn’t just faster—it’s workflow-transforming performance that minimizes bottlenecks and maximizes output efficiency.

Ultra-High Sustained Write Speeds for 4K & 8K Video

Unlike many cards that advertise peak speeds but falter under pressure, the Iridium Series is engineered for true sustained performance. The 800GB and 1.6TB models deliver up to 1500MB/s sustained write speeds, while the 400GB model delivers 850MB/s sustained write, all backed by a VPG400 certification guaranteeing write speeds never drop below 400MB/s. This ensures stable recording for 8K, high-frame-rate 4K, and RAW video workflows. The result: zero dropped frames, no buffering interruptions, and dependable capture during mission-critical shoots.

VPG400 Certified for Professional Video Stability

The Video Performance Guarantee 400 (VPG400) certification ensures the card maintains a minimum sustained write speed of 400MB/s. For filmmakers and commercial videographers, this translates to consistent data throughput required by modern cinema cameras. Whether you’re filming documentaries, weddings, branded content, or feature productions, this certification provides measurable reliability—not just marketing claims.

Rugged Metal Enclosure with Advanced Thermal Control

The Iridium CFexpress card features a full metal enclosure designed to improve structural integrity and thermal conductivity. Combined with built-in thermal throttling, the card actively regulates heat during long recording sessions, protecting both performance and data integrity. In demanding environments—outdoor shoots, extended interviews, or continuous high-bitrate capture—the card maintains stability while safeguarding your content.

Extreme Environmental Durability

This is not a consumer-grade memory card. The Iridium Series operates in temperatures ranging from -12°C to 72°C, with storage tolerance from -20°C to 85°C, making it suitable for harsh climates and unpredictable field conditions. It withstands 50G shock resistance, vibration levels up to 15G acceleration, and is X-ray proof, ensuring durability during travel and rugged production environments. Professionals can rely on it whether shooting in desert heat, winter landscapes, or high-altitude locations.

High-Capacity Options for Extended Recording

Available in 400GB, 800GB, and 1.6TB capacities, this CFexpress Type B 4.0 card gives creators the flexibility to shoot longer without constant card changes. Large capacities are especially critical for 8K workflows and RAW recording, where file sizes escalate rapidly. Fewer swaps mean fewer interruptions and lower risk of accidental data handling errors.

Backward Compatibility with CFexpress 2.0 Devices

Although built on the advanced CFexpress 4.0 platform, the Iridium Series remains fully backward compatible with CFexpress 2.0 hosts, protecting your investment. This ensures seamless integration with current-generation Sony, Canon, and Nikon cameras while positioning your workflow for future hardware that supports higher bandwidth standards.

Intelligent Power Management for Efficiency

Operating at 3.3V (3.0V–3.6V range) with active power consumption around 1.25W and idle consumption under 0.3W, the card supports NVMe power states PS0–PS4, with PS4 consuming less than 2mW. This intelligent power management helps preserve battery life in cameras while maintaining performance under load—an essential benefit during long shooting days.

Advanced Health Monitoring with SMART & Sanitize Support

The card includes SMART monitoring capabilities and sanitize functionality, enabling advanced card health tracking and secure data management. When used with ProGrade’s maintenance tools, professionals can monitor performance status and maintain optimal functionality over time—reducing unexpected failures and improving long-term reliability.

Optimized for Professional Photography & High-Speed Burst Shooting

Beyond video, the Iridium CFexpress excels in high-resolution photography. The combination of high burst write speeds and rapid buffer clearing makes it ideal for sports, wildlife, and event photographers who rely on fast continuous shooting. It ensures camera buffers clear quickly, allowing uninterrupted capture of decisive moments.

Accelerated Workflow with High-Speed Offloads

Pairing the card with compatible high-speed readers unlocks its full 3550MB/s read capability, dramatically reducing post-production transfer times. For commercial studios, production houses, and content teams handling massive file volumes daily, this translates into faster editing turnaround and increased operational efficiency.

Engineered for Professional Videographers and Content Creators

Every specification—from sustained write speeds and thermal regulation to environmental resilience—has been engineered specifically for professional videographers, filmmakers, and advanced photographers. The ProGrade Digital Iridium Series CFexpress Type-B 4.0 memory card is not simply built for capacity; it is designed for performance consistency, production reliability, and future-ready workflows.