256 ГБ только что вскрытая с заводским exFAT, картридер Kingston MobileLite G4 (в материнской плате на H81, процессор x4 3.6 ГГц, 16 ГБ DDR3 1600):
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CrystalDiskMark 6.0.2 x64 (C) 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/
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* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 99.075 MB/s
Sequential Write (Q= 32,T= 1) : 84.678 MB/s
Random Read 4KiB (Q= 8,T= : 10.279 MB/s [ 2509.5 IOPS]
Random Write 4KiB (Q= 8,T= : 3.636 MB/s [ 887.7 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 10.282 MB/s [ 2510.3 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 3.564 MB/s [ 870.1 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 10.276 MB/s [ 2508.8 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 3.481 MB/s [ 849.9 IOPS]
Test : 1024 MiB [H: 0.0% (0.0/238.2 GiB)] (x5) [Interval=5 sec]
Date : 2020/03/30 15:58:33
OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
SanDisk Extreme microSDXC 256GB A2 U3
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CrystalDiskMark 6.0.2 x64 (C) 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 99.433 MB/s
Sequential Write (Q= 32,T= 1) : 79.803 MB/s
Random Read 4KiB (Q= 8,T= 8 ) : 5.946 MB/s [ 1451.7 IOPS]
Random Write 4KiB (Q= 8,T= 8 ) : 4.364 MB/s [ 1065.4 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 5.893 MB/s [ 1438.7 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 4.375 MB/s [ 1068.1 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 5.873 MB/s [ 1433.8 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 4.355 MB/s [ 1063.2 IOPS]
Test : 1024 MiB [R: 0.0% (0.0/116.1 GiB)] (x5) [Interval=5 sec]
Date : 2018/12/29 6:46:42
OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
В итоге случайное чтение заметно лучше, но запись немного хуже. 160 МБ/с... недоложили