I had a 2.0 P35-DSR -- everything worked fine for me. Replaced a dying Asus with a EP35-DSR. DES is nice, but as the poster above says I see now the fan speed control is poached!! 2.0 could control the fan on the CPU and and PWR_FAN connectors, the 2.1 is poached -- all fan's are 100% all the time. ...