CPU will only fit in mother boards with the same chip set every chip set has different pins. I have build many computers over the years and there is never 100% will work even with components direct from the manufacturer. As long as you take the necessary action to fit the component correctly and with the right tools then you've done every thing you can. In my opinion the first time you boot up after the install you should only use 1 memory stick in slot 1 and the HDD with your operating system on and pre download all your drivers for all components before the swap over and store them on a pen drive. So if it doesn't boot up then you know the problem is only with what is plugged into the mobo. Just remember computer can be so fickle I've been doing a repair and everything iv'e tried to do to fix the system will just not work. So I shut everything down and pull out the power cable and went out for the night. The following day I powered the computer up and I booted straight away.
Just one more thing have you checked the compatibility with you memory and graphics card as well, its always worth checking just make sure you know every will work together. If you do have any problems feel free to drop me a private message and I will help out anyway I can

Good luck