Hi sifus, first and foremost, my big thank you to you all for your comments and suggestions.. It really helped me in my research and decision making , after considering everything (budget, etc.)
I upgraded the:
-
CPU to the i7-14470F
-
MOBO to the Gigabyte B760 DS3H AX
-
RAM to 32gb Corsair Vengeance
And kept the rest . As I realised that Video Editing with Premiere Pro uses CPU and RAM a lot more than GPU .
And like you suggested to upgrade, it is really a night and day difference when it comes to scrubbing and quick viewing footages in the Timeline in Premiere Pro, even with 4K footages... so, THANK YOU SO MUCH, SIFUS.

🙏🙏🙏
BUT there is a few things I don't feel right about my new upgrades ...
1) On First/Cold Boot
(when first plugging power cable into the wall and turning on) - My PC will automatically turn on
without even needing to press the Power Button on the casing ...
This feels weird to me. Although it is more convenient... But because I am so used to pressing the Power Button after plugging into the wall plug .
*
NOTE: This only happens on Cold Boot (first plug into wall) ... If I shut down my PC, and don't pull out plug from the wall socket... I can press the Power Button on casing to turn on the PC normally.
2) On First/Cold Boot
(when first plugging power cable into the wall and turning on) - The PC will turn on
(fans all spinning) for 1-2 seconds, and then suddenly turn off
(as if it died), and then turn on again after 1 second , and continue running as normal .
Are all these new characteristics normal , for my new hardwares ??
I called the sales person, and was told it is normal for newer motherboards to first/cold boot this way.. But I don't want to wait until my MOBO or other hardware die (from the on/off/on issue on every startup boot), then only have to claim warranty.