погонял ее на других портах ( мать та же, другой контроллер):
-----------------------------------------------------------------------
CrystalDiskMark 3.0 (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 : 16.144 MB/s
Sequential Write : 11.993 MB/s
Random Read 512KB : 16.777 MB/s
Random Write 512KB : 1.605 MB/s
Random Read 4KB (QD=1) : 3.452 MB/s [ 842.7 IOPS]
Random Write 4KB (QD=1) : 0.021 MB/s [ 5.0 IOPS]
Random Read 4KB (QD=32) : 4.612 MB/s [ 1126.0 IOPS]
Random Write 4KB (QD=32) : 0.021 MB/s [ 5.1 IOPS]
Test : 50 MB [N: 39.5% (3053.2/7728.0 MB)] (x5)
Date : 2011/02/28 18:07:27
OS : Windows 7 Enterprise Edition [6.1 Build 7600] (x86)