Biostar N4SLI-A9 N4SLI-A9 user's manual - Page 11
JCFAN1: CPU FAN Power Header, JSFAN1: System Fan Power Header optional, JNBFAN1: Northbridge Fan - cpu support
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N4SLI-A9 Step 4: Hold the CPU down firmly, and then close the lever toward direct B to complete the installation. B Step 5: Put the CPU Fan on the CPU and buckle it. Connect the CPU FAN power cable to the JCFAN1. This completes the installation. 2.2 FAN HEADERS JCFAN1: CPU FAN Power Header JSFAN1: System Fan Power Header (optional) JNBFAN1: Northbridge Fan Power Header JCFAN1 13 Pin Assignment 1 Ground 2 +12V 3 FAN RPM rate sense (Only for JCFAN1 and JSFAN1.) JNBFAN1 JSFAN1 3 1 1 3 Note: The JCFAN1 and JSFAN1 support system cooling fan with Smart Fan Control utility. It supports 3 pin head connector. When connecting with wires onto connectors, please note that the red wire is the positive and should be connected to pin#2, and the black wire is Ground and should be connected to GND. 9