I need to find a cooler that will fit in my case, and was told to check my RAM clearance. What is it, and how do I find out what kind of case I have? I have a AMD FX 8120 and the fan for it is near dead. I am looking at these fans: http://aaawave.com/p-15515-scythe-scsk-1100-shuriken-rev-b-cpu-cooler.aspx?gclid=CKyQ7suxkcACFUVo7Aod8lIAFQ
http://www.pccasegear.com/index.php?main_page=product_info&cPath=207_23&products_id=19797
http://www.newegg.com/Product/Product.aspx?Item=N82E16835999013&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=6146836&SID=8mc96b8fq4r0
http://www.pccasegear.com/index.php?main_page=product_info&cPath=207_23&products_id=19797
http://www.newegg.com/Product/Product.aspx?Item=N82E16835999013&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=6146836&SID=8mc96b8fq4r0