Control DC fans speed A320M-A PRO MAX

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panchiko115dc02e8

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Is it possible? In the BIOS it only shows PWM mode. Do I need to change the board, or is there any other solution? thanks.
 
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The DC fan speed will maintain at 100%.

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They always try to save every penny/cent on those cheap A-chipset board models, in order to still make a good enough profit on them. So they even cheap out on some essential parts, like a small circuit to have DC (voltage) fan control, VRM heatsinks, Flash BIOS Button, you name it.

On your board, it's exactly like that, in order to save a tiny amount of cost on each board, they simplified the fan header design to only offer PWM control. So if you use 3-pin fans on this board, since they don't have the fourth wire for the PWM speed control signal, they're stuck at a full 12V. There is no way to control 3-pin fans on this board at all, the fan curves will be useless for them. You need some kind of solution like a seperate fan controller, which some cases may offer, or can be bought seperately. Another option is to replace your 3-pin fans with 4-pin PWM fans, for example the Arctic P12 or P14 PWM PST, which are inexpensive, good and quiet.

These shortcomings are mostly on lower-end board models. Once you go for a slightly nicer board model (from lower mid-range onwards), they should be able to have all fan headers controlled in both ways, DC voltage or PWM. Of course, replacing the board over this might be too much. But for a future purchase, i would avoid the A-series board models, as well as the very cheapest board model(s) in general (even from the B-series boards).
 
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citay said:
They always try to save every penny/cent on those cheap A-chipset board models, in order to still make a good enough profit on them. So they even cheap out on some essential parts, like a small circuit to have DC (voltage) fan control, VRM heatsinks, Flash BIOS Button, you name it.

On your board, it's exactly like that, in order to save a tiny amount of cost on each board, they simplified the fan header design to only offer PWM control. So if you use 3-pin fans on this board, since they don't have the fourth wire for the PWM speed control signal, they're stuck at a full 12V. There is no way to control 3-pin fans on this board at all, the fan curves will be useless for them. You need some kind of solution like a seperate fan controller, which some cases may offer, or can be bought seperately. Another option is to replace your 3-pin fans with 4-pin PWM fans, for example the Arctic P12 or P14 PWM PST, which are inexpensive, good and quiet.

These shortcomings are mostly on lower-end board models. Once you go for a slightly nicer board model (from lower mid-range onwards), they should be able to have all fan headers controlled in both ways, DC voltage or PWM. Of course, replacing the board over this might be too much. But for a future purchase, i would avoid the A-series board models, as well as the very cheapest board model(s) in general (even from the B-series boards).
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hibrown said:
The DC fan speed will maintain at 100%.

View attachment 202829

View attachment 202831
Click to expand...
Thanks for the reply guys. I have another question would an Arctic case fan hub work?
 
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That won't do. What this fan hub does is, it takes one 4-pin PWM signal from the board and passes it through to ten fan headers on the hub, while powering the fans via SATA power. This fan hub is a solution when you have a lot of 4-pin fans in the system, way more than there are 4-pin PWM-controllable fan headers on the board. But it can neither control 3-pin voltage-controlled fans, nor can it help set a fan curve/control for them in any way.

You need something like this: https://www.caseking.de/en/phanteks-universal-pwm-fan-hub-retail-black/LULS-316.html

This can take the PWM signal of the motherboard and also control up to four 3-pin fans by "translating" it to a corresponding voltage for them.

Manual is here: https://gzhls.at/blob/ldb/c/3/d/7/4aff477957576a73f46640435c5c6e4c10b4.pdf
 
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citay said:
That won't do. What this fan hub does is, it takes one 4-pin PWM signal from the board and passes it through to ten fan headers on the hub, while powering the fans via SATA power. This fan hub is a solution when you have a lot of 4-pin fans in the system, way more than there are 4-pin PWM-controllable fan headers on the board. But it can neither control 3-pin voltage-controlled fans, nor can it help set a fan curve/control for them in any way.

You need something like this: https://www.caseking.de/en/phanteks-universal-pwm-fan-hub-retail-black/LULS-316.html

This can take the PWM signal of the motherboard and also control up to four 3-pin fans by "translating" it to a corresponding voltage for them.

Manual is here: https://gzhls.at/blob/ldb/c/3/d/7/4aff477957576a73f46640435c5c6e4c10b4.pdf
Click to expand...
Damn, i can't find something like that hub in my country. I think I would just replace the fans... thank you!!
 
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