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Changing motherboards - misc questions
I'm about to replace the motherboard in an old PC (thread here) so I've been looking at the old PC's wiring. I'm puzzled. The PC has 3 fans (outside of the PSU) - the CPU fan and 2 case fans. The CPU fan cable is plugged into the CPU fan header as expected. The two case fans are connected to a cable to the PSU with a molex plug. One of the case fans has an additional wire going to pin 3 of the SYS_Fan1 header. On this MB - a Gigabyte GA-X58A-UD3R) the SYS-FAN1 header has only 3 pins so I think there is no speed control available.
Is there anything wrong with this configuration? I kind of like the idea of fan power being delivered directly from the PSU rather than being routed through the MB. And I really want to avoid any re-cabling if I can avoid it ... even if that re-cabling is just inserting wires into a new plug. However, the new MB - ASUS Prime H370-Plus - all 3 SYS_FAN headers provide speed control. Is it worth rewiring to use that control?
Another question.
The cable from the front panel audio has two daisy-chained connectors. One is plugged into the front panel audio header; the other is just sitting there. Any idea what the 2nd plug is for?