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I got a Samsung 840 Pro and I reinstalled windows. Before this, I had a score of 4.5 with my old HDD drive. For Samsung I got a shameful 5.9 (since this device has the lowest score, the whole laptop is graded as 5.9). Why? On Windows 8 which I had installed for a day, the rating was 7.7 (for SSD).

My system is Toshiba Qosmio x505 with Intel P55 chipset. Win 7 32 bit. I have the SATA AHCI driver installed.

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More informs is required to answer your question. – Ramhound Jul 12 '13 at 15:49
    
@Ramhound - What kind of info. I will provide it. – SolarWind Jul 12 '13 at 15:53
    
@Altar Is the 5.9 the rating for (just) the drive section of WEI, or the total score or WEI? – Ƭᴇcʜιᴇ007 Jul 12 '13 at 16:02
    
The overall Windows Experience Index is taken as the lowest of the subsystem scores, which should be listed on the Windows Experience Index control panel. – Aaron Miller Jul 12 '13 at 16:02
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@Karan Posted as an answer anyway. Who knows? Altar could still accept it. :) – Aaron Miller Jul 13 '13 at 9:12

If Windows 8 gave a better rating than Windows 7 for the same device, perhaps it's a driver issue, such that Win8 has newer drivers and thus gets better performance; you may want to see whether Samsung offers Windows 7 drivers for the device, and install them if so.

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Solved by installing a newer Intel chipset driver. The driver provided by Toshiba was horrible.

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