Newb ?: How to Force SATA boot vs UEFI

[tanderson92]

As I mentioned here, I discovered that my system was extremely slow and choppy because somewhere in the setup the BIOS started booting to my Samsung 840EVO SSD as "UEFI:" instead of "P1:".

I haven't built a computer in a few years and don't really know about UEFI except that the GPT partition used in my OS X setup is supposed to support that kind of booting.

Anyway, if I press F12 and choose the P1: Samsung 840EVO option the computer boots fine and most things work normally. If I boot using UEFI, everything is very laggy, the system thinks it has a 32 GHz processor, and it's basically unusable.

I went into the BIOS of my Gigabyte GA-X79-UP4 and selected P1: as the first boot option. Didn't work. Then I chose it as the only option and disabled the other slots. Still booted into "slow" mode. Then I chose Legacy Only for the boot options. F12 shows only legacy options but an auto boot still is slow. I don't want to have to press F12 and manually select P1. There has to be something easy I'm missing. Please help.

Thanks!

 

[clipper99]

Going from memory here I think if you plug the drive you want to boot into your SATA P0 port it should work. I also thnk I had to play around with the order of the drives in the BBS(?) boot order area of the BIOS.

 

[tanderson92]

Ok, thanks. Doesn't it seem odd that I can set every option (including the BBS which I did) to boot from P1: and it still chooses UEFI even when I disabled UEFI? In any event I'll pop open the computer and see if it likes P0 better.

Thank you again.

 

[jekyoo]

Go into your BIOS' peripherals and set your boot drive to P(x) rather than UEFI. Currently not infront of a computer to tell you the exact steps but you can easily navigate through it. I set my boot drive to P(x) and then disabled all my other boot options.

 

[tanderson92]

Unfortunately, it didn't work. I moved the SSD to P0 and changed it to #1 in the BBS boot options, allowing me to select it as #1 in the regular boot options. The other options are disabled. I let it boot normally and got the slow-spinning wheel that means the overall boot will be slow and choppy. I pressed reset, hit F12 and selected P0 manually. Result: fast boot.

I'm not going crazy about this--yet--because I can reliably get a good boot manually. I'd just like to be able to do it without F12.

Any other ideas?

 

[tanderson92]

Go into your BIOS' peripherals and set your boot drive to P(x) rather than UEFI. Currently not infront of a computer to tell you the exact steps but you can easily navigate through it. I set my boot drive to P(x) and then disabled all my other boot options.

In my first post you can read I did exactly that. I set it to boot to P1: and disabled every other option. I also moved it to P0: and did the same thing.

It still reliably boots well with F12 but boots slowly if I let it boot automatically.

Thanks for trying to help; any other ideas?

 

[tanderson92]

Curious...if I change the Boot Option to UEFI it doesn't boot at all...tells me to restart and select the correct boot device
If I change it to P0 it boots slowly
If I manually choose P0 it boots fine

What's going on here?

 

[tanderson92]

[SOLVED]Newb ?: How to Force SATA boot vs UEFI

I'm not sure how the bootloader was contributing to this issue, but I used Chameleon Wizard to install a new version of the bootloader. On reboot, my BIOS and clock problems were both solved! I think I'm stable enough to write a guide now. I need to document my process so that I can do it again if needed!

 

[m2kool4u]

I'm not sure how the bootloader was contributing to this issue, but I used Chameleon Wizard to install a new version of the bootloader. On reboot, my BIOS and clock problems were both solved! I think I'm stable enough to write a guide now. I need to document my process so that I can do it again if needed!

did you ever make that guide? I have the exact same issue here. What was the version of the bootloader you installed?

Tks

 

[tanderson92]

did you ever make that guide? I have the exact same issue here. What was the version of the bootloader you installed?

Tks

The guide is still on my to-do list, but it got bumped down by other priorities. When I installed Chameleon Wizard, I allowed it to install the most current bootloader available. I don't recall the version number and don't have access to the machine right now. I'm about to check out for 2 weeks. I'll try to write my guide in June.