Does "connected standby" setting exist in UEFI?

Hello,

All tablets with full Windows 8.1 x86 have special "Connected Standby" instead of old standby.

This CS is very annoying for many users because it often makes battery lasting less than one day on this "standby". Most of them don't mind reversing to the old standby mode.

Unfortunately this setting cannot be changed. I can't have CS on a desktop PC, and I can't have old standby on the laptop.

Intel writes in his papers that CS has to be turned on in firmware.

I am not sure, but I understand firmware as a BIOS/UEFI.
I wonder if there is any setting regarding availability of CS mode.
Have you seen anything like that in BIOS/UEFI of tablets?

I think Windows 8.1 on tablets is the same as Windows 8.1 on desktops and laptops. It just checks if device is able to use CS.
I don't know if Windows checks this setting on installation or later.