I'd be surprised if you could fit that in a HAF 912. Just get the TX3 and be done with it. You're just going to be blowing money on something like that when it really won't matter. If you want be thorough, buy another 92mm fan to put on the TX3 and a tube or Arctic Silver 5 and you'll be set. Don't spend 50 bucks on an air cooler for a Phenom II in 2015.