livefree Posted November 20, 2018 Share Posted November 20, 2018 HI guys, The instructions say to attach the H115i Pro's pump tech cable to the cpu fan connection on the mb. My cpu fan connection has 4 pins though. What is the remedy? I don't have any 3 pin connections on this motherboard at all. Link to comment Share on other sites More sharing options...
c-attack Posted November 21, 2018 Share Posted November 21, 2018 It doesn't matter. The "3 pin" connector is really only 1 pin -- a speed sensor. On the Pro coolers the SATA connector provides the power. The motherboard lead does two things: 1) reports a pump speed to the BIOS/motherboard; 2) allows you to bypass or enable (depending on how you look at it) the CPU boot error protection on the motherboard. You must have something to on CPU fan to boot or you get a warning. While it seems like an annoyance with a water cooler, that feature will also alert you to a pump power failure on boot, one of the more likely moments for any electronic device. The guide on the CPU fan header will force the connector into the proper 3 (1) pins. You can set CPU fan control to "disabled" or "full speed", depending on which interface you are using in the BIOS. Not strictly necessary on this model, but I still do it. Link to comment Share on other sites More sharing options...
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