So I recently pulled an awesome looking PWM fan from an old (and busted) LGA775 based Dell Dimension desktop. Fan Specs (from retail version): Column 1 Column 2 0 Model 4715KL-04W-B56-PWM 1 Voltage 12VDC 2 Current 1.30A 3 Fan Size 120mm x 38mm 4 RPM 3600 RPM 5 Air Flow 129.90 CFM 6 Noise Level 50.0 dBA 7 Power Connector 4-pin PWM Here's the one I have, the Dell OEM version, which has a fantastically useless proprietary Dell connector. :shadedshu So here's my problem: I know I have to hack off the useless Dell proprietary connector, but what I want to know is can I power the +12V and GND from a 4-pin molex and then just wire the fan's sense and PWM to the mobo's PWM fan header. Here's the proposed wiring: I know some people might think this is stupid, but I don't want to be pushing 1.3A through the CPU fan header as I'm already using all the other fan headers (on a very very very cheap motherboard ). I also don't plan on running the fan at full speed (50dBA ) 24/7 but I do want to control it manually in speedfan. Also I can't think of any reason why this wouldn't work.