With the above specifications I can recommend the following to increase system performance without the need of replacing the motherboard:
Swap the RAM with two DDR-4 2400Mhz modules.
If you have a HDD then swap for a SSD.
Upgrade your CPU to an Intel® Core™ i7-7700K Processor (8M Cache, up to 4.50 GHz)
What OS do you have? Consider Windows 11 --- which would (have) to be a clean install.
Have you tweaked this registry setting: DisablePagingExecutive ?
If not it can be found via HKEY_LOCAL_MACHINE/System /Control/Session Manager/Memory Management.
Disable all the services which are not require via msconfig
For the age of you system you can also tweak this memory management tweak which will be in the same location as the first tweak to match the same amount of level 2 cache as on the CPU: SecondLevelDataCache
I personally believe it is well worth paying for a subscription for a decent 3rd party firewall like "Glasswire" and then you can be 100% certain that you have switched of all programs which will constant be using your internet connection which must be using your system resources running in the background.
That is pretty much it and of course every now and then house clean your system with a 3rd party application like CCleaner to help unclog your system with unnecessary files which could or will slow system performance.