That's a great heatsink, hard to beat the price/performance. Yes it will fit in the motherboard and it should fit in the case, but it will be close. I have one on an i7 860 in the smaller Cooler Master Elite 310
. Your case and mine are both spec'ed at 7.5" wide. I have just a few mm to spare from the top of the cooler to the side of the case so it will be very close. Before you clamp down the cooler, put the mobo on top of the offsets, set the cooler on top of the CPU, and try setting the side of the case on top. You will hopefully end up with the same (tiny) clearance I have.