thank you for your replies, although i do have a problem, my motherboard does have the 4 mounting holes next to the cpu but my case doesnt, thereforefore my options are limited. so i was thinking either the COOLERMASTER AERO 7 LITE or the ZALMAN CNPS7000B-AlCu how ever i also found a thermaltake polo 375, so out of these 3 which would be the better option.