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x64 SSD Performance Confusion


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I recently tested the x64 SSD I have with ATTO and Crystal. The results appear to be a little slow compared to all the others I have seen. I use the drive as my OS boot. I dont know why it is slow, new Mobo and Cpu installed at the same time as drive, with windows 7.


Any ideas would be appreciated


Details Below




Read 180 MB/s Average

Write 75 MB/s Average



CrystalDiskMark 2.2 © 2007-2008 hiyohiyo

Crystal Dew World : http://crystalmark.info/



Sequential Read : 132.229 MB/s

Sequential Write : 30.913 MB/s

Random Read 512KB : 138.130 MB/s

Random Write 512KB : 18.818 MB/s

Random Read 4KB : 31.685 MB/s

Random Write 4KB : 2.503 MB/s


Test Size : 100 MB

Date : 2009/12/04 17:36:45


Many thanks to anyone who reads and can provide an opinion.


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It would appear that I have a slow one, I have done all of the windows 7 optimizations suggested in previous threads and still it is slow as.


Has anyone got any suggestions as to speeding this up or have I just got myself a slow drive, I bought the X series because I thought it would be the fastest.


Any suggestions please?

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  • Corsair Employees
I would try and image the drive to another drive then down load and run Parted magic under system tools select erase disk and wipe the drive with the secure erase and then when you format the drive use 32K Clusters and test the drive with no O.S. on it to be sure its running at close to the tested spec. 220 MB/s sequential read and 135 MB/s sequential write.
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  • Corsair Employees
I have not tried that specific MB but I have heard of some users reporting performance issue with the Intel P55 chipset which I suspect it may be a BIOS/Driver issue as this platform is still quite new. So it may take some time for the BIOS and drivers to mature a bit before the issue's are resolved.
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  • Corsair Employees

Did you try what I suggest about wiping the drive? Also can you move that to another system as a second drive just to test the performance?

And what did you set the allocation size to in the format and you selected quick format right?

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I did all that was requested, wiped, formated quickly in 32k, tested empty, then tested with OS put back on. Tested in another machine, same performance as before.


Find attached document of performance test.


Looks like I got myself a slow one.


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Few days ago (x256):

Currently 81 GB used (from 256 GB on drive)

CrystalDiskmark 2.2 shows (5x 100 MB)

r 203 w 196

r 174 w 156

r 25.5 w 8.51



r 240 w 150

r 170 w 135

r 19.9 w 16.4


Don't know why such huge changes.

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Tested again this morning,


Sequential Read : 125.653 MB/s

Sequential Write : 34.549 MB/s

Random Read 512KB : 132.006 MB/s

Random Write 512KB : 20.790 MB/s

Random Read 4KB : 22.919 MB/s

Random Write 4KB : 2.781 MB/s


It makes me wonder why I spent the extra cash on the X series, when the P or M series would have given me simular results.


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