DO NOT BUY unless you intend to encapsulate this and only this as your fan system. These are 5 pin fan headers, they will only work with the included controller which will not work well with other systems and likely will not work with your existing controller or fan. You can't rule out the controller and plug fans directly into your MB, just like you can't plug existing fans into that controller. They look like good fans, but that's about it.
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