small button in sappire r9 270x

[kingoffools]

can anyone tell me anything about a small button in sappire r9 270x toxic ,it has the companies logo inscribed over it,and glows blue,i recently got it ,i did'nt got a instruction manual with it,and i'm not able to understand what's written in other sites,some UEFI THING,so something in simpler words will be appreciated

 

[caqde]

That is the dual bios technology designed for use with Windows 8.1 it is supposed to protect the GPU bios against malicious code and reduce boot times when it is switched to UEFI mode.

 

[C12Friedman]

That is the Dual BIOS button which allows you to switch between Legacy and UEFI (a 'friendlier' interface). There are some advantages to enabling UEFI, as Sapphire points out:
"Faster boot and resume times
When compared to the legacy BIOS, systems with UEFI has a much faster boot and resume time to the OS" found here http://www.sapphiretech.com/presentation/product/product_index.aspx?pid=2036&lid=1 - almost at the bottom, titled "Dual BIOS (Legacy and UEFI) Support"

 

[kingoffools]

so i keep it on all the time, is it good or bad,for my system

 

[caqde]

so i keep it on all the time, is it good or bad,for my system

UEFI shouldn't hurt your system and it seems from your experience so far it doesn't look like it is bad. All it will do is provide a better experience (which may not be noticeable like faster boot times) and more features. (whether you use them directly or not. They are there.)

 

[C12Friedman]

so i keep it on all the time, is it good or bad,for my system

It isn't bad, the reason it doesn't come enabled by default is that older systems require the legacy mode otherwise Sapphire probably wouldn't have included legacy BIOS to begin with (UEFI is the newest BIOS interface)

 

[bigrig658]

sorry to ask this in a old post but how do you no if your system is ueif or legacy??