You may have misunderstood the advised and sorry if it sounds rough but your PC is what is often described as a lazy set-up in that Windows has been allowed to install generic drivers rather than the correct system drivers being manually installed;
Once Windows has been clean installed you must then install first the MBs chipset drivers then the storage/SATA drivers and third the graphics drivers, the drivers can either come from a disk provided by the motherboard manufacturer or downloaded from their site and saved to a flash drive etc, this is a must and Windows should not be allowed to check for updates before it has been done as more often than not Windows installs the wrong drivers or in the incorrect order and this can cause all sorts of problems.
The reason why this procedure is so important, the chipset is what enables the MB to be able to communicate with all the hardware + are the first drivers that Windows looks for on boot.
Only the manufacturer of a MB writes chipset drivers for their board and if you don`t install the drivers yourself you will either end up without any chipset drivers or some random drivers that Windows update has found, the order for the driver installation along with where any divers must come from was explained and the above highlighted in red for as to why it is so important.
Because your CPU does not have any onboard graphics the first two drivers to be installed should have been the INF driver ver:10.1.17968.8131_Public and then the latest drivers from Nvidea for your GPU.
The required drivers should have been already to hand and the computer not connected to the internet once Windows had been installed,
i have been using nvidia to keep my graphics drivers up to date.
Once Windows has been installed, you install the necessary drivers for the MB and other hardware and then leave well alone, drivers should not be allowed to auto update and you should never update any driver/s unless the new drivers are intended to resolve a specific issue that you are having, installing new drivers unnecessarily can actually cause you the very issues that any new drivers are intended to resolve and uninstalling the new drivers may not resolve the problem/s that installing the new drivers has caused.
Depending on priority it can take many months before the driver provider releases any fix and depending on the age of the hardware or software concerned they sometimes do not even bother or may have already announced an end of support.
i do not have xmp turned on, i checked my bios and it doesn't have an option for it at all.
Not sure why the above has been mentioned, XMP was not identified as being the cause and because we could see in Speccy that your RAM is working at 2666MHz which is the best for both the CPU and MB, should you wish to look the RAM settings are in the OC Tweaking area of the BIOS and may well presently be set to Auto.
As for the resolution, i am not really sure how to fix that as my second monitor does not support 1440.
The difference in the MHz causes the most problems but other issues are caused by the difference in the response times and one screen being G-Sync compatible while the older screen is not, two G-Sync spec screens would be better for you..
as for vpn, i understand that they can cause issues but i have them turned off unless i am doing specific things then i actively turn them on. i do not use them while gaming. also i almost never have network latency issues. the problem i have have is with pc latency specifically.
Sorry but that was not what you post in your OP and we can only go on from what you tell us and what we can see in Speccy;
I have been having issues with my pc latency spiking into the multi thousands for 5-10 seconds during gaming. I play mostly Overwatch 2 and Escape from Tarkov, I see this happening in both games but Overwatch more consistently.
As you have an Nvidia GPU their info
here is worth you reading.
