Okay so I want to buy the fractal design r4 and also be able to overclock to like 5 ghz. Will the 100i fit in the top of the r4 or would a have to put it in the front? Or is there a single 120 or 140 rad I could use that will cool it well enough? Should I even try an overclock that large using the Asus M5A99FX PRO R.2?
Yes it will here is a link to a thread already here on Teksyndicate
https://teksyndicate.com/forum/build-pc/will-it-fit-giggity/175449
Yeah, but trust me, It's a pain in the ass. The cooler is very crammed into that case. I recommend you check out the new Phanteks case, the Enthoo pro. It's in that price range but loaded with features.
https://www.youtube.com/watch?v=cBhmn21ylkc
Yup, for the money. Gotta have that.
While it does fit(see picture of my rig), it's crammed in there. I actually had to mount the radiator off center(closest to the side panel as possible) to prevent it from pressing against the mb/ram. Luckily the venting holes on the top are spaced perfectly to allow that to happen. I personally would go for the Enthoo Pro case Mo_Elguhiem linked. I'm thinking I will pick one up and move everything over to that case.
http://imgur.com/a/W4m0d
OP, If you're still there, Here is the build I did with the Fractal case and the H100i, It worked, but it was so annoying constantly taking it on and off just because of something. I mean if I was a bit more smarter and patient, I would've got it to work easier, but it seriuosly turned me off from building from a while. A Noctua Nh D14 was an easier in install. But seriously, consider that Enthoo Pro, really good case for the money. https://pcpartpicker.com/b/IQN