Cheers, I'll go give it a shot. Temps running Prime are hovering around the 60-65 deg C level, that sound about right? HSF is a Coolermaster Hyper 612S set up with push/pull 120mm fans - the 'front' fan is the original fan which came with it, the rear fan is a Coolermaster Sickleflow 120mm. It's all sat in a Zalman Z3 Plus case which has good airflow through it with 2 x 120mm fans up front, 1 x rear and 2 x top mounted 120mm fans.