Pre-built PC with no motherboard manual?

Solution
You really should give more information. From what I can gather though this motherboard is in an Asus G11 ROG Desktop. It is a proprietary motherboard used in prebuilt systems. I think you would have to call Asus to get the motherboard manual. If you are trying to figure out an upgrade I am sure the techs at Asus can help. The same would be for a bios update to run a 7th gen cpu.
You really should give more information. From what I can gather though this motherboard is in an Asus G11 ROG Desktop. It is a proprietary motherboard used in prebuilt systems. I think you would have to call Asus to get the motherboard manual. If you are trying to figure out an upgrade I am sure the techs at Asus can help. The same would be for a bios update to run a 7th gen cpu.
 
Solution
On start click on the delete button repeatedly to open the bios. If you can not get into advanced settings it is locked. Is this a mini mb? What is the brand of the Asus computer? Or did you just buy the motherboard used? Also what are you trying to do?

https://www.asus.com/us/Motherboards/H110I-PLUS-CSM/

Does it look like this? I should mention overclocking is not going to happen on your motherboard. You can still run a 6700k though.
 
I am not overclocking but I am going to maybe upgrade to a GTX 1070, and a 650 watt power supply along with the memory and storage. But I'm not sure how much memory the motherboard could handle.