motherboard: reboot In bios and look it up, or better yet, run SPECCY (https://www.piriform.com/speccy/download/standard) it will show in the CPU section what revision it should be
Motherboard manual can be viewed:
http://download.gigabyte.us/FileList/Manual/mb_manual_ga-z97x-gaming3_e.pdf
The power supply worries me for an overclocking, why, it is not a great power supply to overclock on.
So that known you have to understand if you run into problems (i.e. pc will no longer boot because of PC OC or reboots when you try to run a game the overclocking causing stress on cpu or pushing the limitation of what your cpu can handle will be the cause and easiest way will be to reset the Cmos by removing power to pc and pulling the motherboard battery for 5 mins then applying battery and power back on, and trying again.
This can be a tedious method to find out you only can get 0.2GHZ out of your cpu, which will in the end provide you maybe only with 1 fps of performance.
now you understand this, go look at this video and review it like 5 times before you do anything
https://www.youtube.com/watch?v=4vz-ezBs0CQ