miketdi :
I have sold my motherboard only and removed my overclocked i7 4790K CPU. I wish to sell my overclocked i7 4790k by itself. I overclocked this CPU. My question is does the overclock remain on the CPU or will it revert back to stock when put in a new motherboard?
No it doesnt stay overclocked, its the motherboard that controls the overclock of the CPU.
However, if you have sold the motherboard, make sure you clear the bios before you send it, if you send it with its overclocked settings still applied in the bios, you could have one very unhappy customer on your hands, it could damage the parts that they are going to use with it or even kill them.