[Help] Unlocking advanced BIOS of Lenovo Y520-15IKBN

Hi, i want to unlock advanced BIOS menu and if possible enable overclocking. However, i’m not sure if this is the right place since i have read elsewhere that clocks are controlled by ME FW, not BIOS.

At max load the CPU tops out at 50-55 degrees so I was wondering if i can push it a bit as there seems to be some thermal headroom

BIOS version: 4KCN40WW. Link: https://download.lenovo.com/consumer/mobiles/4kcn40ww.exe

Intel ME version: 11.8
Chipset: HM175

I have orderered CH341A and waiting for it to arrive

So, my question is if it is possible to unlock overclocking on this board? Do i need to flash BIOS to do this or can this be done with grub?