herd this term a few times not sure what it means i.e."4K Passthrough' does this mean it will let the video source just go thought not mess with it ? ... at all ? ... or are some passthrough's not as good as others and do mess with it ........ and what about the sound, or this about sound
I'm not sure what you mean by this sound also I meant sony and not nosy lol, the 4k passthough if a true passtrough will not touch the signal, that is correct. It will only take its sound signal from it to use for the receiver. The difference when talking 4k is that a receiver with 1.4 HDMI will passthrough 4k at 24/30 fps max and a HDMI 2.0 receiver can do it in that as well as 60fps (if the source can handle it).
Hope this helps answer at least some of your questions.
EDIT: CNET explains it well here. HDMI 2.0: What you need to know - CNET
let me try ask this again because I still don't quiet get it, so the term pass-through doesn't mean it will pass-through unchanged, but it will past through to best of the ability of the said AV which will most probable be HDMI 1.4 or lower fps than 4K, so 4K pass-through of a lesser AV or most things on the market at the moment that state 4K pass-through would reduce picture quality? yes
No, it will pass though unchanged but your biggest issue would be the hdmi spec but since your tv on LG's site says it has hdmi 4k 60fps spec ports (does not say its hdmi 2.0 which is confusing) I would say get a HDMI 2.0 receiver in the first place. It looks like what you want your setup to be is a pass through receiver to handle the audio and the video to be handled by the tv.
EDIT: seems your tv supports this:
My Computer
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10 Pro x64Ryzen 9 3900X64GB(4x16GB) DDR4EVGA 1080ti FTW3
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