How To Improve SSD Hard Drive Performance 385% Windows 7

Full Instructions Below: Enable Trim in Windows 7 for an SSD Drive

These how to instructions are provided at your own risk and not suggested unless you understand the risks involved. You have to make sure that your controller and motherboard BIOS support AHCI before you complete the registry tweak and BIOS tweak.


I ran a back up of my system drive (SSD) with Acronis True Image Software, before I attempted these tweaks.

The performance increase according to SiSoft Sandra Personal 2012 and Windows Experience Index is significant.


I cannot guarantee that you will receive the same results. I do however recommend making a backup of your SSD system drive before proceeding.


First let's check to see if TRIM is already enabled.
1. We need to open up a command prompt with administrator privileges.
2. Click on the Windows Start Orb.
3. Type "CMD" into the search box.
4. Rick click on the "CMD.exe" and select "Run as Administrator
5. Type this command to check the current state of TRIM
" fsutil behavior query disabledeletenotify"
Results Explained:
DisableDeleteNotify = 1 (TRIM disabled)
DisableDeleteNotify = 0 (TRIM enabled)


This video is about ENABLING TRIM, so if you have "DisableDeleteNotify = 1" as a results, we will need to enable TRIM.


Tweak One
Enabling TRIM for SSD
Note: This will not affect your regular hard drives that do not support TRIM.
1. Type " fsutil behavior set disabledeletenotify 0"
2. You should receive a response of " DisableDeleteNotify = 0" confirming that TRIM is now enabled.


Tweak Two
Enabling AHCI in Windows 7 Registry
1. Click on the Windows Start Orb.
2. Type "Regedit"
3. Navigate to: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\msahci
4. OPTIONAL: Right click "msahci" and export the key to make a backup copy with the original settings.
5. Double click on "Start" in the name column.
6. Change the Value data to "0" and click OK


Tweak Three
Enabling AHCI in your BIOS
This step is different for every motherboard manufacturer, I will provide instructions for how I did it on my Asrock P67 Extreme4 Gen3 mobo with AMI BIOS.

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