What type of case do you have? You can try something smaller like a 92mm heatsink but if your case is something from an OEM that probably won't fit either. As for covering the RAM slots how much RAM does your computer have, how many RAM slots does your motherboard have and how many are occupied?
Case- Rosewill CHALLENGER-U3 Black Gaming ATX Mid
All 4 slots are filled with 4 GB sticks of RAM: the Corsair Vengeance have the tall heatsinks that I may prevent a large cooler.
Thanks for the help.