Am wondering what the differences are between AC Freezer 64 Pro and the AC Freezer 7 Pro Rev.2 are besides the mounting. The 64 Pro is the better choice in terms of airflow with being able to be mounted so it exhausts out the rear of case on AM3/FM1 whereas the Freezer 7 Pro can not, and my case does not have top exhaust. Also with these being rather more budget coolers how should I expect them to handle an overclocked A6 3670k ?