Thermaltake Polo 735 Extreme A2144 4-in-1 Cooler Extreme 4-in-1 cooler best for gaming and overclocking, designed for LGA 775, K8, P4, K7 All copper heat sink design (66 fins) Smart case fan with full speed, auto temp control, VR control function, adjust fan speed manually Powerful 80x80x32 fan, 2-ball bearing Tt fan grille design, without worsening the cooling performance