cvalencia

I just finished my first build 3 weeks ago. I have a i5-4670K, H100i, and an Asus Z87-Plus MoBo. I am quite new to overclocking so I decided to use Asus' 4-Way Optimization as a safe way of doing it. It was able to OC all the way to 4.7 Ghz. I then launched the Aida 64 stress test just to see if it's stable. The first few seconds went by and the voltage on my CPU went all the way up to 1.407 Volts! The way they described it in the YouTube video tutorial of the 4-Way Optimization, the core voltage should not go up more than 1.275 V. As you can from the image below, Aida 64 is telling that there's CPU Overheating due to the increase of voltage (1.407 volts!)
 
I am quite lost guys. I really need help with this.
 
 

I am a first time builder. For some stupid reason I mixed my Corsair AX750 PSU power cord with my ASUS VH238H Monitor power cord. Now I can't tell which one is which.
 
One power cord is made by Linetek, which has a larger diameter and a 300V 105 degrees Celcius marking. The other one is made by Fund Resources Electric Industry with a smaller diameter and a 300V 75 degrees  celcius marking.
 
Like I said, I am first time builder and an unorganized on at that. Sorry for the stupid thread/question. I just need some help with this one. I don't really want to ruin my PSU and Monitor by using the wrong power cables.