You have reached the limits of what the Skylake platform offers. You don’t have Windows 11 support and your only choices will soon be running Windows 10 unpatched after 2025, or switching to Linux. Modern 2C4T processors are faster in games than your setup. You should think about a platform upgrade.

Obviously your budget will be a key aspect of this, but some pointers in general:

1. Make the jump to 32GB of RAM. Many games are able to take advantage of more than 16GB of RAM and that’s mostly due to how they are streaming assets and optimising performance.

2. SSD storage should be the default. This applies both for primary and secondary storage. A 2TB SATA drive for extra games or hosting media or things like that is always going to be faster than spinning rust, so don’t buy a hard drive for secondary storage unless you need more than 4TB of space for media.

3. Quad cores still have limitations. People buying Core i3 processors are still limiting their performance if there’s even a slight hint of multi-tasking. Only consider this if your budget is really low but even then, the Core i5-12400 is difficult to ignore.

With that said, here’s some options to think about:

Intel Core i5-13400 + ASRock B760M Pro RS/D4 + 32GB DDR4-3600 CL16 memory of some description

Intel Core i5-13400 + Gigabyte B760M AORUS ELITE AX + 32GB DDR5-5600 CL36 memory of some description

AMD Ryzen 5 7600 + ASRock B650M-HDV/M.2 + 32GB DDR5-5600 CL36 memory of some description

Platform costs are more or less the same between the Intel and AMD option, and slightly cheaper on the DDR4 front. For longevity you want at least two M.2 slots and front-panel USB Type-C support if you also upgrade your case. You have some leeway on the budget for the CPU on the Intel side, as the Core i5-12400 is cheap and still very good.

Either of these setups will serve you a very, very long time. Likely just as long as your Skylake chip has already done (almost ten years!).