ASUS P8Z77 UEFI install help

Discussion in 'Computer Help' started by xPrimus, Dec 10, 2012.

  1. xPrimus

    xPrimus Junior Member

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    Hi, I recently completed a new system build:

    OS: Windows 7 Pro x64
    Mobo: Asus p8z77-v pro
    Processor: i5-3570K
    Memory: 16 gb G.Skill ARES F3-1866C10D-16GAB
    OS Drive: 128gb Samsung 830
    2nd Drive: 2tb WD Caviar Black
    Optical Drive: 12x BD-R Asus BW-12B1ST/BLK/G/AS
    Power Supply: 750W PCPower&Cooling

    I didn't have a Windows 7 pro disk handy, so I burned one after downloading the file from Digital River. Here's where I got the download link from in case it would help: http://www.mydigitallife.info/windo...links-ultimate-professional-and-home-premium/

    So I put the system together and booted it up, but I didn't see a UEFI boot option in the Asus BIOS, so then I followed this tutorial: http://www.overclock.net/a/windows-7-install-optimization-guide-for-ssds-hdds-by-sean-webster to try and force the issue. Although I was able to get the SSD to switch from MBR to GPT, the second I select to try and install Windows to it, it changes back to MBR in order to install.

    I then tried to disable legacy support in the BIOS to try and force it that way, but that simply lead to an error saying there is no bootable device.

    Now I don't know what to do, and I'd appreciate any help or advice anyone has to offer.
     
  2. Smoove910

    Smoove910 Golden Member

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    Have you tried setting the drive to AHCI mode in the BIOS?
     
  3. xPrimus

    xPrimus Junior Member

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    Yeah, the SATA mode has been set to AHCI from the beginning, no change.
     
  4. Bubbaleone

    Bubbaleone Golden Member

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    Click the "Boot" tab on the BIOS screen.

    [​IMG]

    Change "Setup Mode" to "Advanced", change "UEFI/Legacy Boot" from "Enable both UEFI and Legacy" to "Disable Legacy" then save and exit. When you reinstall Windows it will be in UEFI mode.
     
  5. xPrimus

    xPrimus Junior Member

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    Thanks, but I tried that, it was the last option I tried before giving up and starting this thread. No luck trying it, all I got was an error that said that there was no bootable device.
     
  6. Steltek

    Steltek Golden Member

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    Have you checked to see if there is an updated BIOS available? I know my ASUS Sabertooth Z77 board has had three new UEFI BIOS updates released since August (and seven since June). Also, which SATA port do you have the drive plugged in to? You might want to make sure it is plugged in to SATA port 1.

    EDIT: Most recent BIOS for your motherboard appears to be revision 1708, released on 11/12/2012.
     
    #6 Steltek, Dec 11, 2012
    Last edited: Dec 11, 2012
  7. xPrimus

    xPrimus Junior Member

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    Thanks Steltek, that fixed it. I feel very dumb now. I thought that the board should support UEFI and install on a GPT disk out of the box. Since I only recently bought it, I figured it should have a relatively up-to-date BIOS, but the version was very old. Everything works fine now and I was able to install the system as UEFI.
     
  8. Steltek

    Steltek Golden Member

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    Nothing to feel dumb about. The last BIOS update I did on my Sabertooth Z77 board caused the UEFI/Legacy Boot option in the BIOS to vanish for some reason. I'm hoping that installing the newest available UEFI BIOS will bring it back. We'll see. . . .
     
  9. amerifax

    amerifax Member

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    >>xPrimus<<
    How do you like the board. I'm looking to buy it tomorrow. And issues I should know about.
    Bob
     
  10. amerifax

    amerifax Member

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    Sorry mist post
     
    #10 amerifax, Feb 14, 2013
    Last edited: Feb 14, 2013