The Mugen 5 is one of the larger CPU air coolers you will find on the market, and with that is has an “asymmetric design for maximum memory compatibility,” so it does not extend deep into DIMM territory. The polished copper baseplate, as well as the rest of the HSF is nickel plated. Also we have a newly engineered mounting mechanism.

Source: [H]ardOCP – Scythe Mugen 5 CPU Air Cooler Review