i have the cryorig H7 so should be all goodwhat cooler do you have at present?
it may be more worthwhile to get a better cooler (which will come with thermal paste)
the £16 thermalright assassin king ak120se springs to mind immediately, and it comes with high quality paste...and rgb if that's your cup of tea too lol
no point getting a beast cpu and hamstringing it with a wraith stealth lol