Review on Amplim 64GB V90 UHS-II SD SDXC Card: Lightning Speed, 300MB/S, Secure Digital Memory Storage for Pro Photographer and Videographer by Steven Ross

I tried this card and company because they were MUCH cheaper than other 2000x cards. Out of the 3 UHS-II readers, none of them showed read speeds over 1700X with this card. All 3 readers achieved read speeds of over 290MB/s on the only UHS-II V90 card I have (a V60 card). However, write speeds are pretty decent, hitting over 150MB/s in Crystal Disk Mark. I've had no luck with it on my camera, got a card error when I first plugged it in, and then only recorded 4K video at 45Mbps when it was 90Mbps on a different manufacturer's 1667x card . I haven't finished testing it, but there are much cheaper 1667x cards that can do both: almost identical synthetic performance as the card I got, and BETTER real-world performance (so far) than this card. The card is definitely worth keeping, but without it outperforming cheaper 1667x cards I wouldn't recommend it.