......It's been awhile and I finally got a chance/time to look into this!...Let me just say thanks to all that have responded! You all rock!
...tried first....alas, did not work.....fans still were at a constant super-speed.....and I did not notice any difference when I did - I wonder what it should visibly do?
...tried second....again, did not work, but did notice a visual change.......for me, the video card again stayed at a constant super-speed!....
.......SUCCESS!!.....purchased some "Arctic Silver 5" from Amazon......and took apart the video card's heat sink : so very little paste! - barely covered the GPU....so new paste was added, plus I re-did the the heat sink on the CPU........it's been running nice and quiet ever since.
.....What I find interesting, is that I could play for hours on "Rebirth' with no fan speed change. But the moment I switched to 'Homecoming' or 'ThunderSpy', the fan would go to top speed, once I logged in - the moment a character was visible in-game.....
......Anywho - many thanks to @Marine X for providing the solution to my issue - you might have just saved a marriage!! 🙂 (or at the very least, saved me from moving my set-up to another room/house/city!)