Bests & Worsts Reviews from Amazon

Update 8/25/2016: Added the 256GB card to the comparison. It was much faster write speed and met the 95 MB/s read and 90MB/s write claims! I tested the 64GB and 128GB cards. Both cards exceeded the advertised speeds (80MB/s read and 20MB/s write). The 64GB card provided higher read and write speeds compared with the 128GB card. The 64GB card showed very high 512K random read and write speeds, the random write speeds exceeded the sequential writes. I tested in several different USB 3.0 card readers, the highest benchmarks: EVO Select 64GB Sequential Read : 97.361 MB/s Sequential Write : 25.626 MB/s Random Read 512KB : 88.232 MB/s Random Write 512KB : 64.917 MB/s Random Read 4KB (QD=1) : 9.424 MB/s [ 2300.8 IOPS] Random Write 4KB (QD=1) : 1.717 MB/s [ 419.2 IOPS] Random Read 4KB (QD=32) : 10.423 MB/s [ 2544.8 IOPS] Random Write 4KB (QD=32) : 1.445 MB/s [ 352.8 IOPS] EVO Select 128GB Sequential Read : 82.839 MB/s Sequential Write : 22.677 MB/s Random Read 512KB : 72.126 MB/s Random Write 512KB : 5.837 MB/s Random Read 4KB (QD=1) : 4.969 MB/s [ 1213.1 IOPS] Random Write 4KB (QD=1) : 0.898 MB/s [ 219.3 IOPS] Random Read 4KB (QD=32) : 5.396 MB/s [ 1317.3 IOPS] Random Write 4KB (QD=32) : 0.122 MB/s [ 29.8 IOPS] EVO Select 256GB Sequential Read : 95.664 MB/s Sequential Write : 89.637 MB/s Random Read 512KB : 82.579 MB/s Random Write 512KB : 54.243 MB/s Random Read 4KB (QD=1) : 5.931 MB/s [ 1448.1 IOPS] Random Write 4KB (QD=1) : 2.820 MB/s [ 688.4 IOPS] Random Read 4KB (QD=32) : 8.474 MB/s [ 2068.8 IOPS] Random Write 4KB (QD=32) : 3.596 MB/s [ 878.0 IOPS]