Glacialtech has just launched its UFO V51 cooler line-up compatible with Intel (sockets 775/1366) and AMD (sockets 754/939/940/AM2/F) processors. Available in two flavors, UFO 51 Silent and UFO 51 PWM, these new CPU coolers have copper base, copper heatpipes, aluminum heatsinks and two 92-mm fans. On UFO 51 Silent model the fans have speed of 1,600 rpm producing a maximum noise level of 19 dBA (per fan), while no UFO 51 PWM model the fan speed (800 rpm to 2,500 rpm) is controlled by the motherboard via PWM producing a maximum noise level of 30 dBA (per fan). No word on pricing and availability.