Yes that is the article I referred to. I see there are two drivers to try, the 21.5.2 or 25.11.1. But what is the "Pure drivers for mainboards and CPUs" Do I need that also? I am intending to first just go from my 1500x (which has a video card) to the 2400g naked using my current install then add the driver if that works to test this all. If no go then I can do a fresh install. Thanks.
Pure Drivers means as it sounds. Mostly DLL/INI files just like in DOS era. No GUI app to manage settings and to sit in start tray. Just a set of instructions working in background. AMD does this for CPU and GPU drivers because their hardware is used in every bank/air port/bus where every MB is valuable. Pure drv often uses only 16MB RAM/HDD, where full GUI crap takes 220-650MB!!! <- more than WinXP or Knoppix with all apps

Unfortunately my experience shows that it is always better to install medium drivers (with GUI), because AMD GPU without GUI app uses wrong scaling method (blurred image), and also uses smaller colour palette (dark picture).
3 years ago I have found (on this forum) a pack of DRV for AMD called AMD_AM4_X399_TRX40_Drivers_Bxx_Win7_8.1_SHA256.7z
And thanks to this I have managed to install Win7 to my HDD SSD; cpu: AMD 5600x on MBoard x570MSI Tomahawk Wifi (Wifi does not works, so I sticked usb dongle wifi

) with 32GB ram and RTX3090 (magic driver 470,05

)
My friend has used my Win7 build for his PC: AMD 3950X on MB Asus x450m with RTX2080TI
Turn off XMP for RAM in BIOS or installer will crash. I have such problem where that 15-30 seconds to wait for user prompt goes in 1 second and freezes comp (works too fast

)
Also - prepare HDD properly first. Normally installer does not allows to create only 1 partition and forces you to accept it 3. Therefore if you have just 1 pc or laptop- then use any LiveOS, WinPE or Linux live or even take this drive to friend computer to format. Create new MBR startup and 1 full hdd partition. Set it as active/boot. Thanks to this you will install whole system on just 1 partition instead of 3 and wasting loads of space. It will be easier for you in future to make backup of system or migrate to new HDD, as you will have boot, sys, and recovery all together.
And once you make it - Splinter Cell will works like never before
Unfortunately It is much harder for Intel drivers because these idiots has problems with same file name of different versions....
So - everything is a matter of drivers. NEVER TRUST DEVELOPERS! Always trust passionates - they always proves that proper drivers were always possible to be writen correctly from beginning to support every architecture. It is just dumb corpo practices to push tech forward; making everything obsolete and old in 6-12 months :/ Especially Intel/apple
If you need Win7 or 10 on ANY machine - just install system on old PC/laptop (pre 2014y to avoid Intel Lakes horrors) and put all new computer drivers on this hdd. Swap drive to new machine. 1-3 resets later it should find all drivers to new hardware. In case of problems - go to device manager and delete everything. Works since WinXP
The only bad side of this method -> you have to activate Win again. Or just delete MSOOBE from system to not even trigger it

(Remove WAT v2.2.5.2)
But yes - it is possible to use same system/HDD on 3 different computers/laptops with all drivers to Intel/AMD/Radeon/nVidia and no conflicts.
PS- you can enforce new nVidia drivers on "old unsupported system" if you unpack their exe (by 7z/zip or nvclean install) and look through content of INI file to manually add your system as proper one

But for AMD/Radeon there is no problem at all, because AMD has full support for their hardware/drivers on their site. Look in ThinClient soft XD