Overclocking 101:
First step to overclocking is buying what's needed to accomplish it!
Second step is knowing how to do it, by having a solid overclocking information foundation under you, because that way sir when you read an overclocking guide written by someone clueless you can recognize the mistakes in the guide and not use them!
Just because you discovered an overclocking guide does not mean the writer actually knew what he or she was writing about past their own overclocking experimentation, that seemed successful enough at the time to self qualify them to write the guide!
Has the guide been edited even once since it was posted?
Good writers discover additional overclocking data after the original posting and go back and edit their work so it is current and up to date?
They may need to add or remove information because they discover it is either needed or useless, someone that really cares about their shared written work wants it to be cutting edge, and guaranteed to work for you!
If a guide has not been edited since it's original posting, don't use it, find one that has!
Think about that!
Some guides are written by amazed and enthusiastic noobs because others are too lazy to do it, and they're surprised that what they did even worked?, so they thought they would share it with the world.
They had no overclocking foundation to draw from!
There's a word foundation!
Good builders build their buildings on a solid foundation so their structures will last and stand the test of time, overclocking is the same!
You have to have a solid foundation to overclock from!
What does that mean?
According to Intel the Haswell CPU is designed to run memory speeds of 1333mhz and 1600mhz anything past 1600mhz is overclocking the CPUs memory controller and that's not a good foundation to overclock from when the overclock method is simply to increase the CPU multiplier and the CPU voltage to stabilize the overclock.
High multiplier overclock goals are impeded when they're done from and unstable memory foundation, the memory should be manually set up in the BIOS and nothing left to chance, meaning nothing regarding the memory left on Auto, and definitely not overclocking the CPU memory controller, Why?
Because it adds heat to the CPU and the Haswell is already at a disadvantage because Intel put the voltage controller on the CPU and when the voltage is increased to support the multiplier increase it adds heat.
Overclocking adds heat to the CPU that has got to be dealt with or the CPU overclock quickly reaches it's heat limitations and begins to auto throttle to protect the CPU and there goes your performance you overclocked to get.
If your overclock was not foundation stable, then you had to keep increasing the CPU voltage seeking system stability, but unfortunately you're increasing voltage on an already unstable system, and no matter how much voltage you add to that, it does not equal stable, EVER!