Lexar High-Performance 633x 256GB
Score: 60/100
Samsung EVO Select 256GB
Score: 80/100Rankings
The Samsung EVO Select 256 GB microSDXC offers high capacity and fast UHS-I performance, backed by six-proof durability and an IPX7 waterproof rating. Its main trade-off is a modest warranty period and potential speed drops on older devices. Ideal for Android phones, tablets and cameras where large storage and ruggedness are needed.
Lexar's 256 GB 633x microSDXC offers up to 100 MB/s read speed, a V30 rating, and includes a micro-SD to SD adapter for versatile use. Its slower 45 MB/s write speed and lack of waterproofing limit high-end video applications. Suitable for smartphones, tablets and action cameras where large capacity and broad compatibility are priorities.
| Attribute | | |
|---|---|---|
256 GBbest | 256 GBbest | |
100 MB/s | 160 MB/sbest | |
45 MB/s | 90 MB/sbest | |
| ↓ lower better | 453.6 g | 13.6 gbest |
— | 1 yearsbest | |
| ↓ lower better | 1.02 mmbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(3) | ||
Read Speed (MB/s) | 100 MB/s | 160 MB/s |
Write Speed (MB/s) | 45 MB/s | 90 MB/s |
Speed Class | C10 | Class 10 |
Design(2) | ||
Form Factor | microSDXC | microSD |
Weight (g) | 453.6 g | 13.6 g |
General(1) | ||
Compatibility | wide compatibility with any UHS‑I device while remaining backward compatible with Class 10, V10 and U1 standards | Android smartphones, tablets, cameras, drones |
Products in the top-left offer the best value (high score, low price).
Professional testing shows the Lexar 633x card delivers real-world read speeds near 97 MB/s and write speeds around 69 MB/s, surpassing its advertised specifications and confirming its suitability for 4K video capture. Reviewers acknowledge its solid mid-range performance but point out that newer Lexar BLUE models provide higher peak speeds, making the 633x less compelling for users seeking top-tier throughput.
Everyday users praise the large 256 GB capacity, the included SD adapter for easy file transfer, and the peace of mind from the lifetime warranty. They also highlight the card's reliable 4K video performance and compatibility with a wide range of devices. However, some users note the write speed feels modest compared to newer offerings, and the lack of UHS-II support limits its appeal for high-end professional use.
“huge capacity and impressive speed”
Professional reviewers commend the EVO Select for its large capacity, solid real-world read/write speeds, and comprehensive durability, positioning it as a value-focused alternative to premium cards, though they caution that performance can be device-dependent and note its absence from Samsung's PRO lineup.
Everyday consumers consistently highlight the card's reliable speed for 4K video and photo storage, its rugged six-proof design, and the convenience of the included SD adapter, while occasional complaints focus on speed variability across different devices.
