SanDisk Extreme PRO 256GB
Score: 100/100
Silicon Power 512GB
Score: 100/100Rankings
The SanDisk 256 GB Extreme PRO SDXC UHS-I offers top-tier read/write performance (200 / 140 MB/s) and rugged protection, making it a strong choice for 4K creators. Its UHS-I bus limits it on cameras that can exploit UHS-II bandwidth, and some users report speed variance with cheaper readers.
A 512 GB microSDXC U3/V30/A2 card delivering up to 170 MB/s read and 150 MB/s write, rugged durability and high-endurance options, suited for 4K video, Android apps and demanding outdoor use.
| Attribute | | |
|---|---|---|
256 GB | 512 GBbest | |
200 MB/sbest | 170 MB/s | |
140 MB/s | 150 MB/sbest | |
— | 5 yearsbest | |
| ↓ lower better | 2 g | 0.3 gbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage & Capacity(2) | ||
Capacity (GB) | 256 GB | 512 GB |
Card Type | SDXC | microSDXC |
Performance(2) | ||
Maximum Read Speed (MB/s) | 200 MB/s | 170 MB/s |
Maximum Write Speed (MB/s) | 140 MB/s | 150 MB/s |
Physical(1) | ||
Weight (g) | 2.0 g | 0.3 g |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the blend of high read/write speeds, V30/U3 ratings and rugged build, recommending it for 4K creators while noting UHS-I is slower than UHS-II cards.
Everyday users highlight reliable performance, fast transfers and durability, but note occasional slower-than-advertised speeds and occasional shipping delays.
“Works perfectly with my Sony A7 III and Panasonic GH5”
“Fast transfer speeds save time”
“Durable and reliable”
Professional reviewers consider Silicon Power's 512 GB U3 cards reliable mid-tier options that deliver solid 4K video performance and useful A2 app acceleration, highlighting durability, endurance features and a long warranty as key strengths, while noting they don't match the top speeds of SanDisk or Samsung.
Everyday users praise the cards for consistent 4K recording, good durability and the long warranty, especially noting the High Endurance model's reliability in dashcams, but also mention occasional speed variability, confusing model labels and incompatibility with the upcoming Switch 2.
