Ok, this is a quick and easy question. Situation: The fan for the HSF of my brother's computer has "flown off". Needless to say, he can't put it back in, so he needs a replacement fan. Fortunately it's simply a matter of getting a new 120mm fan and clipping it into place. Question: Since most 120mm fans come with a 3 pin connector, will it fit into the 4 pin CPU_FAN header on the motherboard? Since my brother needs it urgently, and where he lives there are no suitable shops for HSF/fan replacements, I'm gonna have to buy one in the morning and take a train to deliver it. Still, it would be helpful to just check this one point where I'm not sure (and google is surprisingly unhelpful).