Clearance inside a chassis is essential to enthusiasts, in this section we will be looking at all areas to reveal just how flexible 300R really is.
First off – the CPU cooler. Here 300R can accommodate the Noctua NH-U12P pictured. This CPU cooler is 158mm in height and there isn’t a great deal of remaining clearance so the bigger flagships like Noctua NH-D14 and Thermalright Silver Arrow which are 160mm in height could well struggle to fit.
http://www.vortez.net/articles_pages/corsair_300r_review,8.html
I own it , and I don't think it will fit in your case.