Its enough head clearance so it won't hit the psu if thats what you're asking but I don't know about it hitting the side of the case. If you have a mobo that has its socket too close to the edge of the board you might not be able to fit it.
Silverstone NT-06 is 78mm tall
Zalman cnps 8700 is 62mm tall
Sorry, I have a 7700, not an 8700. I was saying that since my 7700 fits in an SG-01, an 8700 should fit since it's a little smaller.
Anyways, my temps are around 35°C-40°C idle and 55°C-60°C load at 3.0ghz (E4500). This is an air conditioned room with my Zalman fanmate keeping my CPU fan at about 900RPM (very quiet).
you could also use a Thermalright XP-120 and it should fit your mobo if you align the heat pipes toward the I/O ports, just offering other alternatives than zalman. I've owned a lot of zalman hsf's in the past and they don't seem to have the noise to cooling ratios compared to other offerings as seen in many reviews.
Remember, the heatsink should fit if it is under 78mm in total height. And with some heatsinks you may have to approximate the heatsink height as some manufacturers include the fan thickness (~25mm) into their overall height specifications.