I have been trying to overclock my 4770k and i don't know much about overclocking so i just used AI suite 3. I set the desired overclock to 4.2 GHz. it works fine for a while, I can play games, I run a stress test and it doesn't crash. But if i leave it on over night when i wake up the following morning it either isn't on or its frozen. I don't know whats wrong, anybody have any ideas?
don't know much about overclocking so i just used AI suite 3
Thats your problem, dont use software to oc cpu's, I dont care what anyone says, AI Suite (& others) is a turd for overclocking - gives way more vcore than needed amongst other things. Learn and understand what happens under the hood. Do overclocking manually in the bios.
Follow a guide like this> http://www.overclockersclub.com/guides/overclock_intel_4770k_guide/
You will learn a lot about hardware in general with the above guide.
This man is correct, the automatic overclocks always usually result in failure or a poor stability in my experience and from people I know who tried them. They make sense for a small overclock ie 10-15% but when you're really trying to push your chip, it comes down to being patient and ensuring you are getting the proper voltages/temps, while remaining stable when stress testing.