What parts to buy for 10 tons to upgrade an old computer?

Question

Iron

Hello, I already have a rather old computer (I attach pictures). Now this PC is needed for work (programs 1c, sbis, various accounting applications, online savings bank, etc.). What can be replaced to improve performance (I suppose it's worth changing the motherboard, processor and RAM). And accordingly, what is better to replace with (what configuration will be optimal with a budget of 10 tons)? Is it worth buying new parts or can I use a used one with Avito?
I would be very grateful for the advice of experienced people. The brakes are now terribly wild absolutely everywhere, except for windows explorer (((

Answer 1

for example:
INTEL Celeron G3930, LGA 1151 BOX - 2100 rubles
GIGABYTE GA-H110M-S2H LGA 1151 - 3000 rubles
CRUCIAL CT4G4DFS8213 DDR4 - 4GB 2133 - 3050 rubles

Answer 2

look at the mother of 2 such fx-6300
strips at used.
market for about ~ 3100r.
such a cooler
on the back wall
2500+3600+3100+710+120 = ~ 10k.
Provided that the PSU screw and case with vidyuhi leave your.
Further it will be visible. Then at least it will be possible to replace the vidyushka and the bp and the screw (add) as the grandmas will be.