Go to this link, http://asrock.pc.cdn.bitgravity.com/Manual/Z390%20Pro4.pdf, page 7 shows that there are 3 4-pin connectors for fans/coolers. Plugs 2, 16, and 17 can be used for what you want.
Go to this link, http://asrock.pc.cdn.bitgravity.com/Manual/Z390%20Pro4.pdf, page 7 shows that there are 3 4-pin connectors for fans/coolers. Plugs 2, 16, and 17 can be used for what you want.