I love how people can't ignore a thread they can't contribute to, instead they post a bunch of stupid posts in attempts to be funny or witty. Seriously make a thread entitled "People trying to be funny and unproductive" and post your failed attempts at humor there.
To OP; Not really sure and I don't know much about computers. But doing a quick search of "ASRock M3A770DE phenom II x4" yielded me this website(I assume is the official website of ASRock the manufacturers of that motherboard) that has a compatibility list to that particular motherboard. Click Here.
Look for the model number of the CPU in question and make sure it's on that list, if it is it's compatible.
Future reference OP, it's probably better to take computer related question to a forum that specializes in computer related things, you should already be able to tell that most the people here are useless idiots.