Buying a fan controller will give you additional fan headers. Alternatively, you can use 3-pin/4-pin to MOLEX adapters and connect the fans right to the PSU. (MOLEX connectors are keyed as well.) MOLEX fan connectors are older and don't offer any controls for the fan, but they're easy to connect..
Herein, what happens when you put two fans together?
If both fans are rotating in the same direction, you get so much turbulence between the two that you might lose some airflow. If the two fans rotate in opposite directions (with reversed blade angles, so that they both push in same direction), and you get the distance between them just right, they will blow more air.
Also, should I plug case fans into motherboard or PSU? You connect case fans to the motherboard, starting with the CPU_FAN label on your motherboard to your CPU fan. This is important because your BIOS often tracks fan speeds to the CPU. If your motherboard doesn't have enough slots you purchase a splitter that attaches to one of your PSU (power supply) cables.
One may also ask, how do I connect RGB fans to power supply?
You will find one with a 6-pin connector on one end marked "Perif", and that plugs into the corresponding socket of the PSU. That cable has THREE female 4-pin Molex output connectors on it, and you should plug one of those into the power input connector of the fan controller in your case.
Where do 3 pin fan connectors go?
3-pin fans will plug directly into a 4-pin motherboard header without any additional adapters. 3-pin fans still have an RPM sensor on them, and most mainboards can still vary their speed based on temperature. 3-pin fans use simple voltage control for adjust the fan speed.
Related Question Answers
How many fans can a fan header support?
Usually this means a maximum of two to possibly three fans per header.Can I connect fan to RGB header?
Each RGB fan comes with 2 wires. One wire is 3 pin and must be connected to the motherboard's fan header. Another wire is a 4 pic and is connected to RGB header on the motherboard. Then use the splitter cable from the wired controller and connect all 3 rgb connectors of the fan to the wired controller.Is one case fan enough?
I recommend at least 2 fans. One for intake and one for exhaust for best results. You can get by with just one fan though if you are careful. Fans are like $5-10 though so it really shouldn't be an issue.Does fan splitter reduce speed?
splitter do not reduce power it only split between the 2 fan and they receive ful power but it will only read one speed sensor for one fan .How many fans can my motherboard support?
Most motherboard will support up to three fans, maybe four. Depending on the CPU cooler, one or two fans may be used, the cooler fan(s) being the most critical.What does cha fan mean?
Asus refers to them as chassis fans or CHA-FAN. Regardless of what name you call it, these are the headers you use to plug in the fans that are used to cool your enclosure or case. As motherboards become more sophisticated, the headers on the motherboard take on more specialization.Can I plug a 3 pin fan into a 4 pin?
Apparently a 3-pin fan can plug directly into a 4-pin socket. Two of the pins provide power to the fan, the 3rd provides an RPM pulse to the motherboard to read the speed. The 4th pin is for PWM speed control. If you plug a 4 pin fan into a 3 pin socket, the fan speed will be controlled by voltage and it'll still work.Does stacking fans increase airflow?
Stacking fans will not increase performance. It will not increase the speed of air pushed through, in fact it may lower it, just because the front fan may disrupt the airflow.Does Push Pull increase cfm?
AS for doubling you CFM in you push/pull no. Because the rad is restictive to air flow your CFM will drop. adding a pull will decrease the restiction. As an example say your fan runs 79 CFM free air.Can you put 2 inline fans together?
Mounting two fans inline with each other increases the "torque" of the airflow but does not increase the maximum unrestricted flow. If you put two of the same fans facing the same way on either side of a 2' tube, the airflow would be roughly the same as if there was only one.Is it easier to push or pull air?
Higher pressure air has higher density. When you push, the air in the duct will have higher pressure than if you were pulling form the other end. This means that for a given unit of time, more air flows though a pushed duct than a pulled one (again- assuming all other things equal).Can you use static pressure fans as case fans?
They're not good only for radiators, they just better for move air through restrictions, such as radiators or drive cages. They also function perfectly fine as case fans, but if the air flow is not restricted, AF fans will work better.How many case fans do I need?
It is always our recommendation that you buy cases with a minimum of 3 fans (or at least slots for adding them yourself) for gaming systems, not counting the power supply, CPU, and GPU fans.What is the effect of stacking two positive pressure blower fans?
Stacking fans increase the static pressure capability of the fan system. What this means is that you now have double the pressure which means the air has greater ability to force it's way past the fins.What is a static pressure fan?
Fan Static Pressure. Fan static pressure is one of the two parameters that define the performance of a fan. The other, and more common, is the volume of air the fan delivers per minute or per hour. Fan static pressure is the resistance pressure the fan has to blow against to move air in the desired direction.Can I run multiple inline fans in series?
Mounting two fans inline with each other increases the "torque" of the airflow but does not increase the maximum unrestricted flow. If you put two of the same fans facing the same way on either side of a 2' tube, the airflow would be roughly the same as if there was only one.Do RGB fans have 2 cables?
1. Each RGB fan comes with 2 wires. One wire is 3 pin and must be connected to the motherboard's fan header.Do RGB fans need RGB headers?
Most motherboards come with two RGB headers, each supplying 12V of power. However, if you have a particularly large PC case that you plan on filling with multiple RGB fans, each requiring its own header, this quickly becomes a problem.Can I connect fans to PSU?
Buying a fan controller will give you additional fan headers. Alternatively, you can use 3-pin/4-pin to MOLEX adapters and connect the fans right to the PSU. (MOLEX connectors are keyed as well.) MOLEX fan connectors are older and don't offer any controls for the fan, but they're easy to connect. 
