In total you'll find five fan header on the GA-X170-EXTREME ECC which is more than enough, to provide a well equipped workstation or a gaming/multimedia rig with fresh air. It is also very practical that connectors feature 4-pin and therefore allow for PWM control. In this case it's really easy to change rotation speeds from within the BIOS or Windows. The fan headers are located around the CPU socket as well as spread over the motherboard.
Looking at the external connectors directly at the I/O panel Gigabyte equipped the GA-X170-EXTREME ECC with a P/S2 connector, five USB 3.0 ports. one USB 3.1 Type-A and one USB 3.1 Type-C connector, two gigabit ethernet ports, one DisplayPort, an HDMI out, an optical out and an analogue audio panel. According to Gigabyte the two yellow USB connectors offer less signal noise and are therefore especially suitable for attaching high-end audio gear such as USB DACs.
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