Ok so I need some advice comparing the FX 8120 vs the 2500k in terms of gaming. Not trying to make the next super computer, but I'm thinking the 8120 is enough for good gaming. Also, i figure the difference between the 8120 and the 2500k could be used for a decent heatsink to overclock the 8120 past 4ghz and get even better performance. This is the 8120 build so far and i think it could easily keep up with the 2500k
As far as I know, even a dual core intel can beat a six core AMD, personally I'd never go with an AMD CPU unless it was a really crappy budget PC. If you're playing games that are mostly GPU intensive then I suppose it'll work, but you'll probably find downsides.
hmmmm are you even serius OP??? look at this benchmarks
Intel Pentium G850 vs AMD- FX 8150.... the 8150 beats the G850 in almost everything....ALMOST everything EXCEPT the most important part....yep! gaming, look: http://www.anandtech.com/bench/Product/404?vs=434
The FX 8100 will overclock, then it will give around the same results for the stock i5. You will only be using more power and your PC won't last as long. The i5 overclocked though will be a beast of a machine and will come up against the i7's. In applications too the i5 will beat the FX. Unless you are getting water-cooling and having a super high OC there is just no reason for it.