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Mod CPU cooler LED brightness

genexis_x
By genexis_x
in Cooling
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Looking for ways to mod CPU cooler LED brightness. Wanted to make the light dimmer but there's no control for that unfortunately. Only 4 pin PWM to control fan speed. Any ideas?

 

Cooler: Deepcool Gammaxx 400 v2 Blue

Desktop specs:

Spoiler

AMD Ryzen 5 5600 Thermalright Peerless Assassin 120 SE ARGB Gigabyte B550M DS3H mATX

Asrock Challenger Pro OC Radeon RX 6700 XT Corsair Vengeance LPX 16GB (8Gx2) 3600MHz CL18 Kingston NV2 1TB PCIe 4.0 NVMe SSD

Montech Century 850W Gold Tecware Nexus Air (Black) ATX Mid Tower

Laptop: Lenovo Ideapad 5 Pro 16ACH6

Phone: Xiaomi Redmi Note 10 Pro 8+128

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The main problem is that both fan and LED use same connector for power. So yes, there's way to dim LED. By choosing to use DC control on fan and then lowering the speed. Because DC means voltage control, lowering the power fan gets also dims the LED. This was also major issue before PWM fans became mainstream.

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12 hours ago, LogicalDrm said:

By choosing to use DC control on fan and then lowering the speed. Because DC means voltage control, lowering the power fan gets also dims the LED.

Will try, thanks for the tip

Desktop specs:

Spoiler

AMD Ryzen 5 5600 Thermalright Peerless Assassin 120 SE ARGB Gigabyte B550M DS3H mATX

Asrock Challenger Pro OC Radeon RX 6700 XT Corsair Vengeance LPX 16GB (8Gx2) 3600MHz CL18 Kingston NV2 1TB PCIe 4.0 NVMe SSD

Montech Century 850W Gold Tecware Nexus Air (Black) ATX Mid Tower

Laptop: Lenovo Ideapad 5 Pro 16ACH6

Phone: Xiaomi Redmi Note 10 Pro 8+128

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On 3/20/2021 at 11:20 PM, genexis_x said:

Will try, thanks for the tip

@LogicalDrm is correct that the power is shared for the fan to spin and the LEDs. As he mentioned lowering the speed can dim the LEDs; but keep in mind that you will see performance degrades the lower you set the voltage. So depending on your cooling needs, this might not be the way to go. @RollinLower suggestion would be the best way to go in my opinion.

 

DeepCool Support

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