About speed test:
Please test the card in USB 3.1 card reader and use desktop PC backside real USB 3.1 blue interface,and card reader must also Identify the interface protocol of USB3.1,it can reach the memory card`s real speed..
These three conditions must be met at the same time:
1) Must use USB 3.1 reader card
2)Must use Desktop PC computer behind blue USB 3.1 interface.
3)The computer interface protocol must be USB3.1 protocol.
![](https://ae01.alicdn.com/kf/S33802841e44641749b9686ba3f9d3219Q.jpg)
Notice
This is upgraded version of 633X, which the reading speed increased to 120MB/S
About capacity display :
The conversion unit used by the memory card manufacturer is different from the conversion unit of the computer.
Memory card manufacturers using 1000 carry system, that is, 1G = 1000MB; computer with 1024 carry system, that is, 1G = 1024MB.
Manufacturer: 32GB = 32 000MB = 32 000 000KB = 32 000 000 000B
Which in turn is recognized by the computer
32 000 000 000/1024 = 31 250 000KB
31 250 000KB / 1024 = 30 517MB
30 517MB / 1024 = 29.8GB
Therefore 32GB¡¯s memory card display 29.8GB in computer;Same,16GB¡¯s memory card display 14.9GB in computer;64GB¡¯s memory card display 59.6GB in computer;128GBs memory card display 119.2GB in computer;256GB¡¯s memory card display 238.4GB in computer,512GB¡¯s memory card display 476.4GB in computer.
Some system files also have a certain amount of capacity, so the actual computer display memory will be slightly smaller than the above data.
Feature
?Capacity: 32GB ? 256GB
?Speed Class:
¡î32GB ? Class 10, UHS-I (U1), V10
¡î64GB ? Class 10, UHS-I (U3), V30
¡î128GB ? Class 10, UHS-I (U3), V30
¡î256GB ? Class 10, UHS-I (U3), V30
¡î512GB ? Class 10, UHS-I (U3), V30
?Performance:
¡î32GB ? up to 120MB/s read
¡î64GB ? up to 120MB/s read, up to 45MB/s write
¡î128GB ? up to 120MB/s read, up to 45MB/s write
¡î256GB ? up to 120MB/s read, up to 45MB/s write
¡î512GB ? up to 120MB/s read, up to 45MB/s write
?Operating Temperature: 0° to 70° C (32°F to 158°F)
?Storage Temperature: -25° to 85° C (-13°F to 185°F)
?Humidity: 25% to 95%
?Dimension (W x L x H): 32 x 24 x 2.1 mm / 1.25¡± x 0.95¡± x 0.08¡±
![](https://ae01.alicdn.com/kf/Scc8f66d54d56447cafc5af15b56c042cP.jpg)
High-speed performance with high-capacity options
Designed for your mid-range DSLR, HD camcorder, 3D camera, Lexar Professional 633x SDHC/SDXC UHS-I cards let you quickly capture, and transfer high-quality photos of stunning 1080p full-HD, 3D, and 4K video, with read speeds of up to 800x (120 MB/s). These Class 10 cards leverage UHS-I technology to deliver high-speed performance.
Capture adventures in 1080p full-HD, 3D, and 4K video
Calling all adventure seekers! Make the most of your adventures in the great outdoors by leveraging the power and performance of these cards. So, whether you¡¯re using a mid-range DSLR, HD camcorder, or 3D camera, you¡¯ll be able to leverage the latest photo and video features available for shooting high-quality images and stunning 1080p full-HD, 3D, and 4K video.
![](https://ae01.alicdn.com/kf/S6c82997f47484c339050543c7c2353baC.jpg)
![](https://ae01.alicdn.com/kf/S8f5b246e447c4280ad6950f2f4823aeas.jpg)
![](https://ae01.alicdn.com/kf/S21161131467a4e6d88eefae2dfed58d7k.jpg)