Dark Knight CPU cooler

Yes it will fit your motherboard.

That heat sink can make it a tight squeeze for your ram. So keep in mind how close your ram slots are to the heat sink and how large the heat sink on your ram is.
 
The case I have is the Antec 1200 Full Tower. I do have the Kingston HyperX ram heatsink (fan) on top of the memory. Might be a tight fit, but I think it will work, the Dark Knight seems more narrow in size then the one I have in my case now. Will try to get the Dark Knight to face out the back to continue the great air flow that the Antec 1200 provides.