Hmmm.. My 2400+ overclocked from stock 2.0ghz -> 2.15ghz is running at 30 idle and 40-45 full load. After 3 days of prime95 it hit 48 degrees. I'm only using a Thermaltake Volcano 12 right now. I will be installing my Thermalright SP-97 whenever I get the chance and see if it makes a difference.