I am building a mini ITX build for a friend of mine. The objective is to pack some decent power into a small form factor. This machine is going to be used for some light photoshop / GIMP purposes also. Hence horsepower is required. And space is a constraint too!
Problem: According to reviews online, it seems that the clearance for the CPU cooler is only 60mm. So it seems stock cooler will definitely not fit. It requires low profile coolers. and from this forum it seems like even 60 mm high CPU coolers wont fit.
Noctua NH-L12 should fit into PC-Q03, therwise NH-L9a fits int both of them. It's not the cheapest solution but you won't regret it. Also make sure it's compatible with your mobo at noctua.at. From my experience the Asrock FM2A75M-ITX isn't.