Fan help Tags: New Build Fan Motherboards Systems Last response: March 26, 2010 9:24 PM in Systems Share daman March 26, 2010 9:16:29 PM Hey guys i bought this fan today its a 120mm masscool fan it has a 3pin for the motherboard and a molex, what i want to know is do i plug both in or just one? its going in an antec300 in the back on the case More about : fan Alvin Smith March 26, 2010 9:24:10 PM either/or ... ... most PSUs have a "Fans Only Molex Leg" on the harness ... usually has black and yellow wires only ... ... Depends on if you want active fan control. = Alvin = Can't find your answer ? Ask ! Publish Related resources: ForumEVGA Nvidia GT240 Fan Very loud --- Help !! ForumHi. CPU not booting but the power is on and the fan is working. Help . ForumPlease help with a Bitfenix Recon fan controller ForumHelp needing a gpu fan software ForumFan choosing help ! ForumGPU Fan Help ! ForumGPU fan too loud help ! ForumNeed help about Y- Fan splitters ForumCan Someone Help me Adjust my Fan Speeds In BIOS? ForumFan making a clicking noise randomly. help ? ForumNeed help with fan size ForumCase fan help ForumNeed help on how to change heatsink fan ..! ForumMy case fan running slow - help please :D ForumCase fan help ! ForumHELP - CPU fan is in the way of the PSU ForumHelp with fan controls setup Forum[ HELP ] HIS Radeon 7870 Fan Issue ForumNew GPU. High fan RPM when power is on. No Video. HELP ! ForumHelp with fan and usb connectors More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !