only 1 more slot availble for case fan

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Yes, you can use that Cooler Master set of three fans plus a LED light controller box. There are two things that make this viable. One is that each fan has two separate cables to it. One is for the LED lights. Each of these cables from the three fans connects to a cable coming from the controller box to power and control the LED's. Power for that comes to the box by a connection from a Molex power output from the PSU.

On each fan, the second cable is for the fan motor's power only, and it ends in a small standard 4-pin fan connector. The fan motors themselves are spec'd to use at most 0.16 A current. So you can connect all three fan motor cables together with a 1-to-3 SPLITTER to the mobo SYS_FAN1 header OR to the SYS_FAN2 header - it...
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Paperdoc

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I presume we are talking only about case ventilation fans, and your CPU cooler fan / system is not part of this. Tell us what maker and exact model number of fans. ALSO, tell us maker and exact model number of your mobo. We can look up all the specs and advise with that info.
 
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Paperdoc

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Yes, you can use that Cooler Master set of three fans plus a LED light controller box. There are two things that make this viable. One is that each fan has two separate cables to it. One is for the LED lights. Each of these cables from the three fans connects to a cable coming from the controller box to power and control the LED's. Power for that comes to the box by a connection from a Molex power output from the PSU.

On each fan, the second cable is for the fan motor's power only, and it ends in a small standard 4-pin fan connector. The fan motors themselves are spec'd to use at most 0.16 A current. So you can connect all three fan motor cables together with a 1-to-3 SPLITTER to the mobo SYS_FAN1 header OR to the SYS_FAN2 header - it does not matter. Each of these headers uses the older 3-pin Voltage Control Mode which can power and control the speed of both 3-pin and 4-pin fans. And each header can supply up to 1.0 A current, twice what the combined load of three of these fans requires. For the Splitter, here's an example with 3 outputs on identical arms:

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423163&cm_re=coboc_fan_splitter-_-12-423-163-_-Product

and another with outputs spread along a longer path

https://www.newegg.com/Product/Product.aspx?Item=N82E16812423162&cm_re=coboc_fan_splitter-_-12-423-162-_-Product

Note that these SPLITTERS each have three outputs for fans and a single input arm that plugs into a mobo SYS_FAN header, but do NOT have a third arm type that connects to a PSU power output.
 
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