Windows 8 and 8.1 Forums


Cant Change My SSD To AHCI Mode

  1. #1


    Leicester
    Posts : 107
    Windows 8.1 Pro X64

    Cant Change My SSD To AHCI Mode


    hi, i have recently bought an SSD. I have heard from a youtube video that changing the Sata controller from IDE to AHCI can give me better performance but i tried to enable this and it doesn't recognize the drive. The PC will not boot in AHCI mode which meant i have to switch to IDE again. I have tried booting from the Windows install DVD but it tells me that i cannot install Windows on this drive.
    Am i missing something?

    Thanks

      My System SpecsSystem Spec

  2. #2


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    You can't switch modes on an already installed Windows without a regedit. AHCI : Enable in Windows 7 / Vista - Windows 7 Help Forums
      My System SpecsSystem Spec

  3. #3


    Leicester
    Posts : 107
    Windows 8.1 Pro X64


    Its ok, i dont mind re installing Windows, its just when i enable AHCI in the BIOS it wont let me install Windows to that drive.
      My System SpecsSystem Spec

  4. #4


    Quote Originally Posted by Spoonhead98 View Post
    Its ok, i dont mind re installing Windows, its just when i enable AHCI in the BIOS it wont let me install Windows to that drive.
    You can't convert a MBR OS or any bootable drive, to GPT, the boot manager needs to be built from an Installation

    Yes you'll have to have a window install for UEIF GPT the best way to set this up is to use Rufus , Once you get to the Install screen then hit F10 which will bring up a command prompt, Use disk part to clean your SSD and Convert to GPT, then continue your install.
    If your computer came with 8 or 8.1 then you'll need to go into your BIOS and turn off Secure boot and enable CSM. enable AHCI yOu need to make sure your Install Image is 64bit. If win 7 then you need a win7sp1 images to be compatible with UEIF
      My System SpecsSystem Spec

  5. #5


    Leicester
    Posts : 107
    Windows 8.1 Pro X64


    Its ok sorted it now, for some reason it wasn't recognizing the drive on port 1 but it does on port 2, My PC came with Vista BTW
      My System SpecsSystem Spec

Cant Change My SSD To AHCI Mode
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