Delkin Power 128GB
Score: 83/100
ProGrade Digital V90 Iridium 256GB
Score: 75/100Rankings
Delkin Devices Power 128 GB is a UHS-II SDXC card delivering V90 speeds up to 300 MB/s read and 250 MB/s write, built for rugged field use. Real-world write performance is slightly lower and speed advantage disappears on UHS-I only gear. Ideal for professionals needing durable, high-speed storage with a lifetime warranty.
The ProGrade Digital 256 GB SDXC UHS-II V90 card delivers top-tier read/write speeds and robust V90 certification for professional video capture. Its main drawbacks are the premium cost and reduced performance on UHS-I-only devices. Ideal for videographers needing reliable 6K/4K RAW recording in demanding environments.
| Attribute | | |
|---|---|---|
128 GB | 256 GBbest | |
300 MB/sbest | 300 MB/sbest | |
250 MB/s | 275 MB/sbest | |
| ↓ lower better | 45 gbest | — |
— | 3 yearsbest | |
| ↓ lower better | 2.5 mm | 2.1 mmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Capacity (GB) | 128 GB | 256 GB |
Performance(2) | ||
Write Speed (MB/s) | 250 MB/s | 275 MB/s |
UHS Speed Class | U3 | UHS-II |
Design(1) | ||
Thickness (mm) | 2.5 mm | 2.1 mm |
General(1) | ||
Warranty (years) | lifetime years | 3 years |
Products in the top-left offer the best value (high score, low price).
Professional reviewers consistently commend the Power 128 GB card for delivering near-spec V90 speeds, robust shock resistance, and an industry-leading lifetime warranty with fast replacement. However, they also note that real-world write performance falls short of the advertised peak and that the card's advantage diminishes in UHS-I-only equipment.
No direct consumer reviews were found; most online listings only repeat retailer specifications, so everyday user sentiment is largely unavailable.
Professional reviewers are not directly quoted in the available sources; the information consists mainly of manufacturer datasheets and retailer specifications that emphasize the card's high sustained speeds, durability and suitability for flagship cameras.
No consumer reviews or testimonials were found in the research, so everyday user sentiment cannot be summarized.
