Is the game optimised for multithreaded cpu's?

do you guys know if the game can use more then 1 or 2 cores? i just bought a 6c 12t i7 and was wondering if it would benefit from it.
already looked and googled,not getting a straight answer,at the moment i only have a quad core and im getting between 40 and 60 on average with 1% lows of 10 fps paired with a 1070 at 1440p,also,i bought the royal edition dlc pack,why dont i have the high res texture dlc? does it not come with it?

Yes it does and you can download the hd pack for free at least in gog.