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The ProGrade Digital Iridium Series CFexpress 4.0 Type B Memory Card boasts an impressive write speed of up to 3000MB/s with a sustained write of 850MB/s and 1500MB/s.
Yes, this CFexpress Type B Iridium 4.0 card is designed with low-power consumption, making it ideal for filming continuous high-resolution videos without your camera shutting off.
The ProGrade Digital Iridium Series CFexpress 4.0 Type B Memory Card is compatible with a range of video resolutions, from 4K to 8K and beyond.
The CFexpress Type B Iridium 4.0 card offers accelerated data transfer read speeds of up to 3550MB/s, significantly speeding up your workflow.
The VPG400 rating on the CFexpress Type B Iridium 4.0 card ensures a minimum sustained write speed of 400MB/s, guaranteeing consistent performance and reliability.
Review Summary
2026-04-15T13:06:26
Been using prograde for years. Always get exactly what you want
ROBERT O.
400GB, 800GB, 1.6TB
CFexpress Type B
PCI-Express 4.0
Maximum: 3550 MB/s
Maximum: 3000 MB/s
Minimum: 400 MB/s
Sustained:
400GB: 850 MB/s
800GB/1.6TB: 1500 MB/s
Low power consumption for extended battery life when recording continuous video
VPG- 400
10 to 161 Degree F (-12 to 72 Degree C)
-4 to 185 Degree F (-20 to 85 Degree C)
1.17 x 1.52 x 0.15" (29.6 x 38.5 x 3.8mm)
Memory Card with Reader 400GB: 192223293656 | 2-Pack Memory Card 1.6TB: 810188400772 | 2-Pack Memory Card with Reader 1.6TB: 192223287679 | 2-Pack Memory Card 400GB: 850061606013 | Memory Card with Reader 1.6TB: 192223293670 | Memory Card with Reader 800GB: 192223293663 | Memory Card 1.6TB: 810188400765 | 2-Pack Memory Card with Reader 400GB: 192223287648 | Memory Card 400GB: 850061606006 | Memory Card 800GB: 850061606020 | 2-Pack Memory Card 800GB: 850061606037 | 2-Pack Memory Card with Reader 800GB: 192223287662
ProGrade Digital has developed its new CFexpress Type B 4.0 Iridium class memory cards with next-generation performance leveraging PCIe Gen 4 interconnect with NVMe host controller interface for use in future Mirrorless, DSLR and high-definition cinema cameras. Performance levels provide read speeds up to 3550MB/s - CFexpress Type B cards are ideal for quickly off-loading high volumes of video or RAW photos and sustained write speeds up to 850MB/s and 1500MB/s respectively - perfect for uninterrupted, cinematic capture of RAW 4K or 6K video. The CFexpress Type B Iridium cards are VPG400 rated.
https://progradedigital.com/warranty-policy
877-219-0203