Lexar Professional 633x 512GB SDXC UHS-I Card

hi guys in this video i'm going to be taking a look at the lexor professional 633 times sdxc card this is the slowest card in lexus current sdxc lineup but that also means that it's the cheapest and it's still advertised as being suitable for recording 4k video so let's test it and see how it performs looking at the specs on the packaging this is the uhs1 speed class 3 card and lexar advertise maximum read speeds of up to 95 megabytes per second and more importantly for recording 4k video maximum write speeds of up to 45 megabytes per second first i plug the card into usb 3 card reader and tested it using a number of benchmarking apps in aj system test the card managed 28 megabytes per second for the write speed and 90 for the read speed so quite a bit short of the advertised write speed but the read speed seems to be fine next in black magic disk speed test the write speed peaked at ar