At stock this cooler is competitive with the 6-heatpipe Asus Ice Star at load – 45C on the Silent 939 versus 40 on the Ice Star - and under overclocked idle conditions it also matches the Asus cooler. When the heat is really turned up though, the advantage of copper fins and 6-heatpipes shows. In fact I had stability problems with the TT cooler if I tried to overclock much more, while the Asus was able to deal well with further Overclocking. This is not really surprising, as this silent CPU heatsink is obviously not a competitor for enthusiast coolers.