Modifying Vbios

[thebennyboy]

I'm trying to modify the Vbios of my 280x's so that i can increase the power limit. However i get this when i open it in the vbios editor:

What does that mean? Sorry if that sounds dumb at all.

 

[Orangey]

UEFI is a modern BIOS.

I think there is a switch on the side of the card to change between UEFI and legacy (old) BIOS.

http://www.techpowerup.com/forums/threads/r9-280x-uefi-bios-problem.204127/

 

[thebennyboy]

UEFI is a modern BIOS.

I think there is a switch on the side of the card to change between UEFI and legacy (old) BIOS.

But if i edited the bios then reflashed it to the card would that cause any issues? The only thing i know about UEFI bios' is that some motherboards use them.

 

[Orangey]

It means you should set the switch to legacy BIOS and flash that one. Flashing the other one will fugg it up.

 

[tommybhoy]

But if i edited the bios then reflashed it to the card would that cause any issues?

Nope.

Just make sure first of all both bios positions are fully working before flashing anything along with backing up your original bios.

If you **** up the flash and brick one of the two bios, don't be foolish and attempt to flash the only working bios, if you ***** once you can do it twice.

 

[rtho782]

If you have a modern board with EFI (a good indicator is a graphical BIOS screen you can use your mouse in) then you have the option of booting in UEFI mode.

This means a slightly faster boot, and means installing windows in UEFI mode. It gives you the option of secure boot, and lets you boot from drives/partitions over 2TB.

If you don't care about that, you can still boot in "legacy" mode. You lose the advantages above.

When the machine boots, it loads either the legacy bios or UEFI bios from the GPU, depending on what is set in the bios. If you flash this card, there will no longer be a UEFI bios, so you'll have to have "load legacy optrom" or similar enabled in the motherboard bios. You may still be able to boot windows in EFI mode depending on the motherboard, but your POST times will be a bit longer and Secure Boot won't work.

UEFI bioses can't be edited by the tool you are using, forcing you to use legacy if you want to mod the BIOS.

My old 7970 didn't have a UEFI bios so I couldn't have secure boot on my z97 board, but I still installed windows in EFI mode. When I switched to 980, I had UEFI, disabled loading legacy roms, and shaved a second or two off my boot time.