Overclocking help/questions

[Deleted]

Hey everyone, I'm new to everything concerning overclocking as just have managed to build my own PC. So the person that was assisting me and showing me how to install/manage everything showed me the basics? of overclocking by basicaly changing cpu , multiplier? and adjusting Vcore and LLC levels. So yesterday I started off by setting to 4.5Ghz with with 1.340 voltage and it was fine, even after 1 hour of Prime95 testing. Then I bumped it up to 4.6 @ same voltage and also was fine for the hour of testing. Then, I happily knowing that my chip achieved the speed I was hoping for(as I didn't really need more than that for everyday use), I still continued to push trying to go as far as I could. So I've put 4.7 in @ still 1.340 voltage and after ~10 minutes of prime testing my 4th core fatal error'ed out. I have absolutely no idea what that error means, even after checking that stress.txt. Quick google showed that maybe? thats problem with RAM?
Time was long over midnight so I decided to put it back to 4.6 and leave it for more than one hour. Sadly enough, after I woke up and checked, both 3rd and 4th core error'ed out. 3rd after 4,5hours and 4th after 14 minutes?!

Right now anything above 4.5Ghz after just simply using my pc w/o stress testing will eventually after 10-30 minutes fail and my screen will just freeze :S

So basically what I'd like to know, is what those errors indicate so I can fix it. Thanks.

P.S If I have 2 memory modules that are 1600Mhz and I run them in dual channel mode they will show up as 800Mhz in Cpu-z right?
P.S.S CPU is i5-2500k, mobo is asrock extreme 4 z77

[hapylol]

Those errors mean that the CPU cannot handle the power with the volts you have selected which is why you need to continually up the voltage to increase speed.

I would stick with the 4.5 @ 1.34 volts.

[Deleted]

Well, that's a relief Yeah I will stick at that speed for everyday use, I just want to know how far I can push it :P Thanks.

[Blulight]

P.S If I have 2 memory modules that are 1600Mhz and I run them in dual channel mode they will show up as 800Mhz in Cpu-z right?

Dual channel means you got 2 sticks running at 800Mhz each. 800+800=1600Mhz. You are correct.