it depends on the number of rams you would be using... is it 2 or 4 stick??? in dual memory settings, the sticks occupy the second and fourth slots from the cpu... that gives some breathing space for the cooler upto the first dimm slot...
See the below pics for clearance to the ram in a 1366 board... i think it should clear in a 1156 board too...
http://www.images.clunk.org.uk/reviews/tuniq/tower_120_extreme/IMG_1904.jpg
http://www.images.clunk.org.uk/reviews/tuniq/tower_120_extreme/IMG_1890.jpg
the whole setup can be viewed here
http://www.clunk.org.uk/reviews/tuniq-tower-120-extreme-cpu-cooler-review.html