The cooling performance of the Thermaltake FRIO was not what I was expecting - it was in fact better! When compared to other heatsinks in its class, it delivers performance similar to the Noctua NH-U12P SE 1366 and Thermalright TRUE, both of which are single tower-style heatsinks, but with one more heatpipe than the Noctua and one less than the TRUE revisions. The dual fans help it achieve these numbers. In both stock and overclocked tests, the low fan speed setting was four degrees warmer than the full-bore setting on the fans. Not a bad result for a low noise solution.