My bro built me a PC out of old parts during lockdown, I bought a 240hz monitor to use with it. frames were like 150-180 in Quake so my bro gave me a GTX 1080, now frames are 160-200.
The PC as it stands is i5 2500K at 4.2Ghz, 8gb ram 1333Mhz along with the 1080. I don't want to go as far as upgrading the mother board and CPU and ram so these are my two options:-

1/ Upgrade the ram to 16Gb 2133Mhz and overclock the CPU further (it's liquid cooled and runs really cool).

or

2/ Upgrade the ram to 16Gb 2133Mhz and put in an i7 3770k (the fastest cpu my motherboard will take) and overclock that to mid 4Ghz?

The first option will cost about 60, the second option will cost 160.