LLC control's will help reduce the vdroop as much as possible, that doesn't mean that it'll eliminate it completely, therefore you will not get the exact same voltage as you set in the BIOS.
The aim is to reduce it as mush as possible without it spiking. Vdroop varies with mobo's, however Ultra high is genreally the best one to use on an asus 1155 mobo. Yes the voltage will probably be a little lower than what is set in the bios but it'll be as close as it should be without spiking it above. The aim is to control the voltage as much as possible, LLC can help you with that, but the voltage fluctuation is completely normal, just try and keep it lower than what you set in the BIOS.
LLC Extreme: Vcore set in BIOS - 1.35 - IDLE in windows would probably be 1.35/1.36 - LOAD would be 1.37/1.38. (not so great)
LLC Ultra high: Vcore set in BIOS: 1.35 - IDLE - 1.35/1.36 - LOAD would be 1.34/1.35
LLC High: Vcore set in BIOS: 1.35v - Idle 1.35/1.36v LOAD - 1.32/1.33.
The lower you go the higher the difference would be, that difference is called vdroop. I recommend using ultra high and increasing the vcore as you overclock, don't use LLC to compensate the vcore under load to what you need for an overclock, use the vcore in combination with a fair LLC control.
Hope that makes sense.
Regarding the USB, Im pretty sure it requires the FAT32 format in order for it to be recognised in the BIOS, but im not sure about that, let me have a quick look around, I'll edit the post once I find more details.
Raja @ ASUSEdited by munaim1 - 10/13/11 at 11:24am
Easy way is to save UEFI screenshots to a FAT32 flash drive by pressing F12 and then uploading them so I can see what's what.