Is overclocking like this?

Code:

intel core i5 4690k :)
but some guy told me the voltage doenst really matter that its "unnecisary" idk how to spell it to lazy to find out lol
 

Increasing the voltage is only required if you experience system instability after increasing the multiplier. You increase the voltage by small steps until the system performs OK. You can also run some CPU burn-in tests in order to check the stable operation. Also remember to monitor the CPU temperature!
 
set your CPU multiplier to 45 and set the core voltage to 1.250. Try running Intel burn test for 20 mins. If you PC completes the test successfully and your CPU core temperature is below 90 degree, you have a stable overclock. If it BSODs, then you might need to increase you voltage in 0.025 increments. My advise is don't go beyond 1.2 Volts. Probably you can start with 1.050 core voltage and 40 muliplier. If it is stable, increse the multiplier to 4.1. if your PC BSODs, increse the core voltage by 0.025volts.
 


so the highest i can do is 4.5ghz with 1.250 core voltage?
 
nothing like that. On an average all the 4690K s are capable of running in 4.5Ghz with 1.250Volts. If you are lucky like me, You can push your 4690K to 4.5Ghz with voltage lesser than that. I have my 4690K running @ 4.5Ghz with 1.175 Volts which is very Good. I had my 4690K pushed to 4.9GHz with 1.325Volts. At 5.0Ghz, it started giving BSODs. Dont raise your core voltage beyond 1.300 volts. Using high voltage will reduce the lifespan of your chip.