How to turn on AHCI to improve hard disk performance

Problem Description: In Win7, in addition to changing hardware, is there any way to improve the performance of the hard drive?

Problem analysis: In general, our hard drives are not fully able to play out all the performance, you can use some settings to put the performance has not played out, and better utilize all the resources of the hard disk, so as to improve the speed of the hard drive to achieve the increase in the performance of the hard drive.

Solution: Do not need to download other software, simply need to set a few steps, you can achieve the effect, improve the speed of the hard drive.

First, open the Run tool on the Start menu (the keyboard win+r key combination can be opened quickly). Enter "regedit" and click "OK".

Figure 1 Entering "regedit"

When you click OK, the Registry Editor opens. Then, according to the path "HKEY_LOCAL_MACHINE" → "SYSTEM" → "CurrentControlSet" → "Services" → "msahci" to find the file location, and finally open the right "Start", the window of the number "3" changed to "0".

Figure 2 Opening the file path in Registry Editor in turn

Figure 3 Opening the start

Figure 4, change the number 3 to 0

Win7 Open AHCI Special precautions

You can restart the computer after you change the value. After reboot, enter the BIOS, the "SATA raid/ahci Mode" Change to "AHCI", different bios will have different differences, here is not one of the instructions.

AHCI mode open in BIOS

By default, the notebook computer automatically turns on AHCI mode, and the desktop motherboard turns on IDE compatibility mode by default. If AHCI is turned on in the BIOS and not modified in Win7 as shown in Figure 4, it may cause the computer to boot blue screen.

Finally, you can also test your system for fractional values. Enter the "control Panel" → "System security" → "Check the Windows Health Index" can see the system's score.

Fig. 5 System measuring points

Hard drive performance has not been fully played? What are you waiting for? To open ahci in Win7, to play a better strength.