This is my speed comparison between SanDisk Extreme Pro 64GB and SanDisk Extreme Plus 64GB UHS-I microSD cards ---- SanDisk Extreme PRO 64GB UHS-I // Up to 95MB/s read speed and up to 90MB/s Write Speed c: SanDisk Extreme PRO 64GB UHS-I/U3 Micro SDXC Memory Card Speeds up to 95MB/s with 4K Ultra HD Ready-SDSDQXP-064G-G46A Sequential Read: 95.325MB/s Sequential Write: 90.660 MB/s Random Read 512 KB: 89.314 MB/s 512 KB Random Write: 75.971 MB/s 4 KB Random Read (QD=1): 7.492 MB/s [1829.0 IOPS] 4 KB Random Write (QD=1) =32): 7,472 MB/s [1824.3 IOPS] 4 KB Random Write (QD=32): 2,380 MB/s [581.0 IOPS] ---- SanDisk Extreme Plus 64 GB UHS-I // Up to 80 MB/s reading and up to 50 MB/s writing: SanDisk Extreme Plus 64 GB UHS-I/ U3 Micro SDXC memory card Up to 80 MB/s with adapter, handy packaging - SDSDQX-064G-AFFP-A (change of label reserved) Sequential Le sen: 94.971 MB/s Sequential Write: 65,528 MB/s 512 KB Random Read: 89.070 MB/s 512 KB Random Write: 50.656 MB/s 4 KB Random Read (QD=1): 7.691 MB/s [1877.7 IOPS ] 4KB Random Write (QD=1): 2.436MB/s [594.8 IOPS] 4KB Random Read (QD=32) : 7.229MB/s [1764.9 IOPS] 4KB Random Write (QD=32) : 2,405 MB/s [587.2 IOPS] Card format exFatVerified by Transcend Information USB 3.0 memory card readerCrystalDiskMark500 MB [E: 0.0% (0.0/59.4 GB)] (x2) Windows 8.1 (x64) CPU Intel Core i7 -3632QM @ 2.20-3.2GHz
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