Thank you for your comment,
Can you give me a few CPU's with minimnal investment that will do the job for the next few years?
You can get really good deals on intel 10th or 11th gen right now, or ryzen 3000 series.
The i5 11/10400 and ryzen 5 3600 are both very good upgrades for you.
Though sadly you will need new ram and a new motherboard.
Newer chips although faster are not the best bang for the buck so 1 generation behind the newest seems to be very good for price-performance.
and I wouldn't get a lower end chip than those.
even the fastest 4 core processor would not be that big of an upgrade in my opinion and going 6 cores is a much more meaningful upgrade, so i7 4770-i7 7700k are not gonna be that big of an upgrade.
(Unless you can get an i3 12300 a motherboard and ram for cheap*)
i5 8400-9400 would be okay, but I think they wouldn't even be that much cheaper than 11th gen that is quite a bit faster.
*it is a 4 core cpu which isn't good, but it is the fastest 4 core cpu in existance probably, and I think it will be fast enough to be a meaningful upgrade, but it is the only 4 core to be so.