The exhaust case fan in my 13-year-old pc finally started packing in so I purchased a 120mm Silent Wings 3 PWM fan, to eventually keep as a spare with a new build. The motherboard is an Asus P6 Deluxe with only 3 pin chassis connections and Q-fan control for DC fans. I read that connecting a 4 pin plug to the 3 pin header is okay, merely leaving off the pin that delivers the PWM voltage. I have enabled Q-fan to that fan set to standard and it appears to be acting as a DC fan, HWinfo64 telling me it is spinning at around 1200rpm, slightly ramping up on pc use. Am I right in what I have assumed? Incidentally, HWinfo64 also tells me my CPU fan is either at 0 or around 84000rpm!