[Bibio]

unless your CPU is at 100% then you have headroom and until such times there is no need to upgrade as its your GPU that is doing most of the hard work.

again unless you run out of available RAM then no need to upgrade.

if you start to encounter glitches while watching movies and your not running your CPU, GPU or RAM at full throttle then i would look at a new motherboard for an updated pcie buss.

at the moment your system is doing a fine job of 1080p if you discover when you get your new projector its not playing smoothly then start to look at your resources to see which component is lagging in power. if on the other hand your system is playing everything including 4k HDR smoothly then the system is doing its job and no need to upgrade.

you will be like me and your HTPC is just for watching movies so no need for multitasking and masses of computing power.

its obsessive gamer junkies that 'must have' the latest and greatest massive computing power. not watching movies.

think about stand-alone 4k bluray players, how much computing power do they have? not a lot is my answer.