Jim Taylor wrote:
Yes, I think you have found the cause (actually I guess it's the source, the
cause is still undetermined) of your performance problem. It would be
interesting to test the card on Windows 7 or XP or another machine. In any case
it's good to know that CrystalDiskMark runs on Windows 8.
I tested this card on my Windows 7 x64 desktop machine (using an external card
reader) and got very similar results:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 18.171 MB/s
Sequential Write : 11.250 MB/s
Random Read 512KB : 17.789 MB/s
Random Write 512KB : 0.356 MB/s
Random Read 4KB (QD=1) : 3.058 MB/s [ 746.6 IOPS]
Random Write 4KB (QD=1) : 0.003 MB/s [ 0.8 IOPS]
Random Read 4KB (QD=32) : 4.018 MB/s [ 981.0 IOPS]
Random Write 4KB (QD=32) : 0.003 MB/s [ 0.8 IOPS]
Test : 1000 MB [I: 24.4% (7.3/29.8 GB)] (x5)
Date : 2012/06/13 9:28:28
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
-----------------
So I guess it is the card...
I have a couple of 8GB cards around somewhere, and if I can find them I will
test them also.
Thanks for telling me about CrystalDiskMark!
--
David Wilkinson
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