Angelbird AV PRO 128GB
Score: 88/100
Delkin CFexpress 512GB
Score: 89/100Rankings
The Delkin 512 GB POWER 4.0 CFexpress Type B card delivers industry-leading read/write speeds up to 3650 MB/s and 3240 MB/s, built for rugged field work. Its limited compatibility and higher cost compared to other CFexpress options are trade-offs. Best for professional photographers and videographers needing ultra-fast off-load and high-bit-rate 8K/6K/4K capture.
The Angelbird AV PRO SD V90 128 GB is a professional-grade UHS-II SDXC card delivering up to 300 MB/s read and 260 MB/s sustained write speeds. Its rugged build and ECC features add durability but it needs UHS-II hardware and lacks bundled accessories. Best suited for videographers and photographers needing reliable high-speed storage in demanding field conditions.
| Attribute | | |
|---|---|---|
128 GB | 512 GBbest | |
300 MB/s | 3,650 MB/sbest | |
280 MB/s | 3,240 MB/sbest | |
| ↓ lower better | 1.98 gbest | 22.68 g |
3 yearsbest | — | |
| ↓ lower better | — | 8.89 mmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Capacity (GB) | 128 GB | 512 GB |
Performance(3) | ||
Read Speed (MB/s) | 300 MB/s | 3650 MB/s |
Write Speed (MB/s) | 280 MB/s | 3240 MB/s |
Interface | UHS-II | PCIe 4.0 x2 |
Design(2) | ||
Form Factor | SDXC | CFexpress Type B |
Weight (g) | 1.98 g | 22.68 g |
General(1) | ||
Warranty (years) | 3 years | lifetime years |
Products in the top-left offer the best value (high score, low price).
Professional reviewers from Wex Photo Video, B&H Photo Video, and Adorama consistently commend the Angelbird AV PRO SD V90 MK2 for its reliable 260 MB/s sustained write speed, robust durability, and Stable Stream technology that prevents speed drops during long recordings.
Direct consumer reviews are scarce in the available data, but inferred feedback suggests users appreciate the card's fast transfer rates and rugged build for field work.
Professional reviewers commend the Delkin POWER 4.0 for its high sequential speeds, exceptional thermal management, and proven reliability with cinematic cameras. While its sustained write performance is strong, it falls short of the Black series' benchmark, and its incompatibility with older card formats is noted as a limitation for mixed-system users.
Everyday users highlight the card's ruggedness and ability to handle continuous high-bit-rate recording without slowdown, appreciating the rapid off-load speeds that streamline post-production.
