Simply put, overclocking your processor (or CPU) involves running your processor at a faster speed than was intended out of the box. While overclocking, at its core (no pun intended), can be quite simple, there's a bit more to it than just tweaking one setting. The harder you push your processor, the more voltage you need to give it, because without enough power, the CPU can't run fast enough. However, higher voltage also means higher temperatures, so you need to be careful not to overheat your CPU, which can lower its life, not to mention fry it completely if you aren't careful.So you can download everest ultimate edition and see you temperature of your cpu at first,if its not high you can but if is high,you clean your cooler and aslo if you have termall paste put on your cpu.If you temp is fine you can do it but you dont push the cpu to place where he cant go,if you overclock max you can have problems and be slower not faster and you cpu can fail.For example:If your cpu is on 3.00ghz you overclock it to 3.40-50ghz max if you have good cooling and if you dont want to have problems.Or 2.80 to 3.20,2.66 to 3.0 max,2.40 to 2.80 so the differcint need to be about 0.30ghz to 0.50 not anymore.So watch this video and do the same what im doing.
You need to go perfomance boost/frequency control and core clock you have min-max.Like you see my min is 200 max 265.Go on core clock and speed about 0.20ghz and see how will perfomance.If is slow and have problems just restart and go again and back to normal,because some cpu's when overlocked they are not made for that and they will dont give better perfomance.