I've exagerated ( quite ) a bit on saying double the speed but here are the numbers and some more details:
Full Size SD:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World :
http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 21.266 MB/s
Sequential Write : 18.625 MB/s
Random Read 512KB : 21.167 MB/s
Random Write 512KB : 17.680 MB/s
Random Read 4KB (QD=1) : 8.051 MB/s [ 1965.5 IOPS]
Random Write 4KB (QD=1) : 3.188 MB/s [ 778.2 IOPS]
Random Read 4KB (QD=32) : 8.244 MB/s [ 2012.6 IOPS]
Random Write 4KB (QD=32) : 3.395 MB/s [ 829.0 IOPS]
Test : 50 MB [I: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/12/14 16:55:12
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Erase Block Size: 8MB Write Unit: 32KB Page size: 8KB Open aus: 28
Algorithm: Random Write Unit
Micro SD Hong Kong MBMPAGVDDBCW-B:
MANFID: 0x1B OEMID: 0x534D Date: 09/2014
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World :
http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 23.486 MB/s
Sequential Write : 12.845 MB/s
Random Read 512KB : 23.053 MB/s
Random Write 512KB : 18.822 MB/s
Random Read 4KB (QD=1) : 7.233 MB/s [ 1765.8 IOPS]
Random Write 4KB (QD=1) : 2.976 MB/s [ 726.7 IOPS]
Random Read 4KB (QD=32) : 7.572 MB/s [ 1848.6 IOPS]
Random Write 4KB (QD=32) : 3.181 MB/s [ 776.6 IOPS]
Test : 50 MB [I: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/12/19 23:17:19
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Micro SD Worten:
MANFID: 0x1D OEMID: 0x534D Date:10/2014
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World :
http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 23.663 MB/s
Sequential Write : 12.973 MB/s
Random Read 512KB : 21.842 MB/s
Random Write 512KB : 17.139 MB/s
Random Read 4KB (QD=1) : 4.859 MB/s [ 1186.4 IOPS]
Random Write 4KB (QD=1) : 1.598 MB/s [ 390.2 IOPS]
Random Read 4KB (QD=32) : 4.948 MB/s [ 1208.1 IOPS]
Random Write 4KB (QD=32) : 1.228 MB/s [ 299.7 IOPS]
Test : 50 MB [I: 0.0% (0.0/14.9 GB)] (x5)
Date : 2014/12/18 19:03:14
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Erase Block Size: 8MB Write Unit: 32KB Page size: 8KB Open aus: 28
Algorithm: Random Write Unit