External fan controls will only allow you to reduce fan speed to a certain point before they stall out due to impedence. PWM control from the motherboard allows you to lower that threshold. It works by breaking the current flow into pulses and then controls the speed of the fan by varying the duration of the pulses. No one comes to the Father but through me. My aio CM cpu cooler needs 2 fans just for the front mounted rad. The board does not have enough pinouts for 4 fans and the pump. With my noctua fans at about rpm pump on high-only one plugged into the board and a silent case, I can barely hear it at all.
If I decide to encode or whatever then I can just jack it up to full. If your mobo has plenty pinouts and a gui to control them great. As for the temp probes, I may attach one to the rad and maybe a couple more to the ram sticks just for kicks. I can use atuning to check temps for cpu.
Nzxt is cute but based on my exp. If there are not enough mobo fan headers to go around you can also use splitters unless the total amp draw of the multiple fans is too much. Thanks guys, appreciate all the feedback. As I said, new to this so some of that stuff I'll still have to decipher but all seems like great advice.
No doubt will be asking your help again soon. All the DC fans are specified with a minimum threshold voltage rating; if the voltage falls below the threshold, the fan starts to stall. For continuous spinning motion, this minimum voltage needs to be supplied. DC voltage control is the method to vary DC fan speed and this can be implemented by incorporating resistances in the supply wire.
The voltage drop across the series resistor reduces the voltage reaching the fan supply pin, automatically slowing the speed of the fan.
If the resistor connected is a variable one, the fan speed can be varied until it stalls at a minimum threshold voltage. Nowadays, standalone fan controllers with knobs are available for this type of DC fan speed control. The control input is usually an open-drain or open-collector output with a 5 V or 3. The PWM control signals are square waves of high frequency, usually 25kHz or above, to make the noise from the fan above the audible human range.
The PWM signal can start or stop the motor, depending on the high and low state of it. When the PWM signal is high, the motor runs, otherwise, the motor is stationary. The duty cycle of the PWM signal controls the speed of the fan motor.
The motor will be supplied with 12 V throughout, however, the duty cycle of the PWM signal decides how long the fan should be running or not. The chassis and CPU temperature are the two factors that influence the speed of the cooling fans. The new technology advancements have brought firmware and software controlled PWM fans, where the speed is controlled according to the CPU or case temperature. DC Fan. PWM Fan. Voltage control.
PWM control. The supply voltage is varied for speed control. The supply voltage is constant throughout the operation, the PWM signal duty cycle controls fan speed. Precise speed control is difficult. Seamless speed control. Limited in reducing speed below that which corresponds to the minimum threshold voltage. Previous Next Sort by votes. Mar 9, 1 0 0. This is my first build and im not sure if i need a fan controller or if my motherboard can support this many fans.
TBH i dont even know what im saying but here i go. Is there already a fan controller do I need one? Can my mobo support all those fans? I read the specs and got confused where they talk about fans. MidwestG37x Commendable. Dec 11, 48 0 1, 9.
That motherboard only has 3 fan headers in addition to the CPU fan header. So if you are running 4 fans plus the fan on your CPU cooler, you will be short one fan header. You don't need a fan controller though, you can get a 3 or 4 pin fan splitter to connect two fans to a single fan header. Isokolon Judicious. Jul 24, 6, 34, 1, Get a simple splitter. Cougars, Phanteks, Noctuas, Silent Wings all out perform them by a mile in all departments flow, pressure, noise and are usually around the same price.
Aeacus Glorious Ambassador. Mar 21, 7, 43, 2, Your MoBo has 3x case fan headers on it. You can also set custom fan profile from BIOS if you like. Fan controller, in the other hand, usually occupies one 5.
But what you can use, besides Y-splitter, is a fan hub. Fan hub is an internal device that is powered by PSU and enables you to have way more fans that your MoBo supports while you still have control over it via BIOS or software. You must log in or register to reply here.
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