Do you mean i5-3570K? If yes, there is almost 100% certainty that the i5-3570K will reach4.5Ghz with good cooler like Hyper 212. A scythe mugen 2 is a monster so you got good chance to reach 4.7 even.
The issue is really how much heat you are willing to deal with. I had the Intel® Core™ i5-3570K running stable at 4.6GHz with the Corsair H100 and it was just under 90c. So reaching 4.5 to 4.7 may not be a problem but you may not one to keep it running long.
You may get some temperatures close to what I have with my H100. I have read that some people think that it blocks some of the air flow out of the case because of the size of the radiator.
i will most likely have it as an intake as i have a 200mm fan at the top exhausting but i might even swap it out for 2x120, also what speed do get run your fans at?