JEMC on 27 June 2016
Your i3-2120 CPU is from the Sandy Bridge family, socket 1155. It will be a bit hard to find a new processor, but you should be able to find used ones.
This is a list of compatible Sandy Bridge CPUs: http://www.cpu-upgrade.com/CPUs/Intel/Core_i3/i3-2120.html
Your best options are the i7-2600 and i5-2500, because I'm going to assume that your motherboard won't let you overclock, which is the main reason to get a "K" processor. But if you can find one of them for cheap, go for it!
Please excuse my bad English.
Former gaming PC: i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Current gaming PC: R5-7600, 32GB RAM 6000MT/s (CL30) and a RX 9060XT 16GB
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.
