Great news for oneplus x users.
Sultanxda has started development of lineage for opo, we may soon get it too.
Finally wait for best nougat rom will be over.
Oos version 3.1.4
just unlock the bootloader then flash the TWRP ?
You are good to go then.
3rd core is always at 2.3 GHz?
Paranoid is back, and there's a build also for onyx.
Take a look here: http://get.aospa.co/official/onyx