I am doing my first build. I have a GA-X58A-UD3R rev 2 motherboard and it references attaching the "North Bridge" fan cable to the NB_FAN header. I don't see a fan, only heat pipes and sinks. I'm guessing there is no fan, correct?
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The NB_FAN is if you replace the stock passive cooling or add an after-market NB cooler with 'active' cooling a/k/a fan cooling. Some people purchase a small clip-on fan to the stock NB for additional airflow.