I've just ordered and received one of these from Korea, model 3100. It replaced a FOP38 and it performs not as good as the FOP. With the FOP I was running at 800@1060, temp below 40 Celsius. Zalman 3100 is running at 800@1020, temp 43 Celsius. The difference in loudness is great, now it's possible to be in the same room as the PC. Have plans for modding the cooler, move the fan to center above the FHS and mount a casefan at the back of the case to extract air out of the case. I've read several reviews of the cooler, some bad and some good. I think it performs quite well, and it is silent.