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Old 12-10-2012, 10:18 PM   #1
xPrimus
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Join Date: Dec 2012
Posts: 4
Default ASUS P8Z77 UEFI install help

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/window...-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...y-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.
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Old 12-10-2012, 10:37 PM   #2
Smoove910
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Have you tried setting the drive to AHCI mode in the BIOS?
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Old 12-11-2012, 01:08 AM   #3
xPrimus
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Yeah, the SATA mode has been set to AHCI from the beginning, no change.
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Old 12-11-2012, 12:22 PM   #4
Bubbaleone
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Click the "Boot" tab on the BIOS screen.



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.
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Old 12-11-2012, 08:52 PM   #5
xPrimus
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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.
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Old 12-11-2012, 10:17 PM   #6
Steltek
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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.

Last edited by Steltek; 12-11-2012 at 10:35 PM.
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Old 12-12-2012, 11:05 PM   #7
xPrimus
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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.
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Old 12-13-2012, 01:51 PM   #8
Steltek
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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. . . .
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Old 02-12-2013, 11:43 PM   #9
amerifax
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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
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Old 02-14-2013, 02:53 AM   #10
amerifax
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Default Want to be sure.

Sorry mist post

Last edited by amerifax; 02-14-2013 at 02:56 AM.
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