To activate full overclock features it is neccessary to activate kip loader in your hekate.ipl config of your EMUMMC:
kip1=atmosphere/kips/loader.kip
If you do not want to adjust it manually, you can use the "RamPatcher: MGCL/MGCR inkl. OC - 4GB" in Ultrahand menu. It replaces the hekate.ipl and add a new ini to "More Configs". 8GB RamPatcher is also included.
It is a bundle based on following repositories:
https://github.com/sthetix/hekate-ext or https://github.com/CTCaer/hekate/
https://github.com/halop/OC-Switchcraft-EOS/
https://github.com/ppkantorski/Ultrahand-Overlay
https://github.com/masagrator/SaltyNX
https://github.com/ppkantorski/nx-ovlloader
https://github.com/ppkantorski/Status-Monitor-Overlay
https://github.com/masagrator/FPSLocker
https://github.com/masagrator/ReverseNX-RT
https://github.com/ppkantorski/sys-clk
https://github.com/ppkantorski/Memory-Kit