How to Enable AHCI in Windows 1. Recently a very loyal reader of my blog requested me to create a guide on enabling the Advanced Host Controller Interface (AHCI) in Windows 1. Before we proceed, let me tell you what exactly the AHCI is. It makes NCQ (Native Command Queuing) along with hot- plugging or hot swapping with the help of SATA Serial- ATA host controllers. Nowadays, nearly all the motherboards have the AHCI enabled in their BIOS or UEFI. However, some old motherboards may not have this feature enabled. Enabling the AHCI in BIOS or UEFI is crucial, especially when you desire to install Windows with the help of AHCI rather than IDE. Below is a very easy step- by- step guide with relevant images to turn it on: Enable AHCI in Windows 1. With windows 7 already installed can i enable ahci afterward? On your Windows 1. This will open the Run. For this, double click on the 0 DWORD from the right pane of Start. Override. 7: Type 0 (zero) and hit OK. AHCI : How to Enable in Windows 7 / Vista. A: enable AHCI in Windows 7. Better read this thread first: HOWTO: enable AHCI mode after installing Windows - PC.Normally enabling AHCI. Enable AHCI After Installing Windows 7/Vista. Http:// http://support.microsoft.com/kb/922976. I recently upgraded a user from XP to Windows 7. The cause is Windows 7 will only install the AHCI drivers at. Enable the AHCI driver in the. Once again from the left pane of Registry Editor, navigate to the following location. HKEY. This is just to ensure that whether you have the Start. Override or not. Now close your Registry Editor. Finally boot your computer to BIOS or the UEFI firmware settings. From the settings enable AHCI, Save and Exit. And once again for the final time restart the computer and you are all done enabling AHCI. As soon as your Windows 1. AHCI drivers. 1. 7: Once the drivers are successfully installed, you need to restart the Windows when prompted to finalize the settings. I hope you were successful in enabling AHCI following this guide. Please do leave your thoughts in comments, and, if you are facing any issues, let us know and we. Windows 7 6. 4- bit does not boot with AHCI Enabled (Barracuda. Hi TDK6. 50. M,For your information, Seagate Barracuda. SATA 3. Gb/s 5. 00. GB Internal Hard Drive is compatible with Windows 7 3. Windows 7 6. 4 bit edition. The link below has the information. Windows 7 Compatibility Center: Seagate Barracuda. SATA 3. Gb/s 5. 00. GB Internal Hard Drive. The reason why Windows 7 doesn’t boot when you enable AHCI mode in BIOS is because Windows 7 disables the AHCI drivers during the installation. I would suggest you to follow the steps mentioned below in order to enable AHCI in Windows System Registry. Important The steps mentioned below tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added. protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge. Base: How to back up and restore the registry in Windowswww. Change the mode from IDE (Integrated Drive Electronics) to AHCI (Advanced Host Controller Interface). Save the changes and exit. Windows will now install the drivers for your AHCI. You would need to restart one final time to finish the process after the drivers are installed. Hope this information is helpful and let me know if this worked. Mouneshwar R – Microsoft Support- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -Visit our Microsoft Answers Feedback Forum and let us know what you think. By marking a post as Answered, or Helpful you help others find the answer faster. ASUSTe. K Computer Inc.- Forum- How to enable AHCI in Windows 7 after installation. Hi,AHCI (Advanced Host Controller Interface) enables native command queuing and hot- plugging through SATA host controllers (Serial- ATA) for your hard drives. In many scenarios it enables more efficient multi- tasking. Vista was the first Windows OS to support AHCI out of the box, where as Windows 7 does the same. But an issue with AHCI is that if you install the OS without enabling AHCI in the BIOS, enabling it after installation will render your OS unusable. This is because Windows disable the AHCI driver since it is not needed during the installation. There is one way to fix this, although you need to have knowledge of registry editing. The detailed steps from Microsoft are as follows: To resolve this issue, enable the AHCI driver in the registry before you change the SATA mode of the boot drive. To do this, follow these steps: Exit all Windows- based programs. Click Start, type regedit in the Start Search box, and then press ENTER. If you receive the User Account Control dialog box, click Continue. Locate and then click the following registry subkey: HKEY. When you log in to Windows again, you’ll notice the installation of drivers for AHCI. Another restart will be required to finish the driver installation. Hopefully, you’ll find a somewhat noticeable improvement in multitasking, specially if you’re a notebook user. Of course with the variety of PC hardware, experience many vary. This article was written on 8 May, 2. Imran Hussain For users of the P6. TSE, Install Intel Matrix Storage Manager Driver after you've done the procedure, as I suppose to be better than the windows driver. PS: if you decide to enable back the IDE mode, do the procedure backwards and do not forget to uninstall Intel Matrix Storage Manager Driver before.
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