^5 +1 what englander753 said.
There will not be any issues with the motherboard or memory. Just intall the memory before installing the cpu heatsink.
The real issue as englandr753 correctly pointed out is the width of your pc case. That cpu heatsink is one of those 160mm tall tower styles. You'll have to make sure your case is wide enough to accomodate it. A case that is at least 8 inches wide should not be a problem.