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Fan Speed Adjustment Help

evirth
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Decided to add a fan to my side panel but because I only have two fan headers on the mobo I used a y-splitter to connect the new fan and my pump cooling fan to the chassis fan header. Both fans get powered but the new fan isn't getting its speed reduced after adjusting power percentages in BIOS (to about 20% power). This is where I need help finding another way of reducing the speed of the fan because with it running at full speed it's just too damn loud and legitimately sounds like a lawn mower.
Additional notes: Chassis header is 3 pin while CPU fan header is 4 pin (idk if this makes an impact but oh well); I can move the pump's connector to the chassis header if needed, running a Corsair H60 for CPU cooling, new fan is a CoolerMaster Sickle Flow (120 mm)

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yes it does, I had a similar issue in the past, you are trying to connect a 4pin (pwm fan) to a 3pin (non-pwm header). Look for a header with 3 pins in your mobo and you will be able to set a curve. Pwm and non pwm work quite differently when it comes to fan speed changes

CPU: Intel - Core i7-8700K @4.9 GHz 6-Core Processor CPU Cooler: be quiet! - Dark Rock Pro 3 67.8 CFM Fluid Dynamic Bearing CPU CoolerMotherboard: MSI - Z370I GAMING PRO CARBON AC Mini ITX LGA1151 Motherboard Memory: PNY - Anarchy 16GB (2 x 8GB) DDR4 @3000 MemoryStorage: 960 evo 500gbVideo Card:place holderCase: Phanteks - Enthoo EVOLV ITX TG (Black) Mini ITX Desktop Case Power Supply:SeaSonic - EVO Edition 620W 80+ Bronze Certified Fully-Modular ATX Power Supply Case Fan: be quiet! - SilentWings 3 pwm 59.5 CFM  140mm Fan Case Fan: be quiet! - SilentWings 3 PWM High-Speed 73.3 CFM  120mm Fan Case Fan: be quiet! - SilentWings 3 PWM High-Speed 73.3 CFM  120mm Fan Monitor: Dell - S2716DG 27.0" 2560x1440 144Hz Monitor Mouse: Place holder Sony H.ear on Wireless Noise Cancelling Headphone, Charcoal Black (MDR100ABN/B)  LEOBOG K26 Wired RGB Mechanical Keyboard,Gaming Keyboard,RGB Color Backlight,104 Key,Anti-Ghosting For Full Key,Blue Switches,Aluminum Chassis,Detachable wrist rest,PC,Computer, Laptop,BLACK (Black)EZDIY-FAB Sleeved Cable - Cable extension for power supply with extra-sleeved 24 PIN 8PIN 6PIN 4+4 PIN With COMBS- Black Grey

pcpartpicker: https://pcpartpicker.com/user/resdal42/saved/sCW6XL

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19 minutes ago, IAnthonyFX said:

yes it does, I had a similar issue in the past, you are trying to connect a 4pin (pwm fan) to a 3pin (non-pwm header). Look for a header with 3 pins in your mobo and you will be able to set a curve. Pwm and non pwm work quite differently when it comes to fan speed changes

so should I connect the splitter to the CPU header?

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19 minutes ago, evirth said:

so should I connect the splitter to the CPU header?

if it is 3pin yes.

CPU: Intel - Core i7-8700K @4.9 GHz 6-Core Processor CPU Cooler: be quiet! - Dark Rock Pro 3 67.8 CFM Fluid Dynamic Bearing CPU CoolerMotherboard: MSI - Z370I GAMING PRO CARBON AC Mini ITX LGA1151 Motherboard Memory: PNY - Anarchy 16GB (2 x 8GB) DDR4 @3000 MemoryStorage: 960 evo 500gbVideo Card:place holderCase: Phanteks - Enthoo EVOLV ITX TG (Black) Mini ITX Desktop Case Power Supply:SeaSonic - EVO Edition 620W 80+ Bronze Certified Fully-Modular ATX Power Supply Case Fan: be quiet! - SilentWings 3 pwm 59.5 CFM  140mm Fan Case Fan: be quiet! - SilentWings 3 PWM High-Speed 73.3 CFM  120mm Fan Case Fan: be quiet! - SilentWings 3 PWM High-Speed 73.3 CFM  120mm Fan Monitor: Dell - S2716DG 27.0" 2560x1440 144Hz Monitor Mouse: Place holder Sony H.ear on Wireless Noise Cancelling Headphone, Charcoal Black (MDR100ABN/B)  LEOBOG K26 Wired RGB Mechanical Keyboard,Gaming Keyboard,RGB Color Backlight,104 Key,Anti-Ghosting For Full Key,Blue Switches,Aluminum Chassis,Detachable wrist rest,PC,Computer, Laptop,BLACK (Black)EZDIY-FAB Sleeved Cable - Cable extension for power supply with extra-sleeved 24 PIN 8PIN 6PIN 4+4 PIN With COMBS- Black Grey

pcpartpicker: https://pcpartpicker.com/user/resdal42/saved/sCW6XL

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if your fan is 3 pin use a 3 pin splitter (if needed) for the 3 pin header.
if your fan is/pump etc are 4 pin, use you 4 pin splitter in a 4 pin header

CPU: Intel - Core i7-8700K @4.9 GHz 6-Core Processor CPU Cooler: be quiet! - Dark Rock Pro 3 67.8 CFM Fluid Dynamic Bearing CPU CoolerMotherboard: MSI - Z370I GAMING PRO CARBON AC Mini ITX LGA1151 Motherboard Memory: PNY - Anarchy 16GB (2 x 8GB) DDR4 @3000 MemoryStorage: 960 evo 500gbVideo Card:place holderCase: Phanteks - Enthoo EVOLV ITX TG (Black) Mini ITX Desktop Case Power Supply:SeaSonic - EVO Edition 620W 80+ Bronze Certified Fully-Modular ATX Power Supply Case Fan: be quiet! - SilentWings 3 pwm 59.5 CFM  140mm Fan Case Fan: be quiet! - SilentWings 3 PWM High-Speed 73.3 CFM  120mm Fan Case Fan: be quiet! - SilentWings 3 PWM High-Speed 73.3 CFM  120mm Fan Monitor: Dell - S2716DG 27.0" 2560x1440 144Hz Monitor Mouse: Place holder Sony H.ear on Wireless Noise Cancelling Headphone, Charcoal Black (MDR100ABN/B)  LEOBOG K26 Wired RGB Mechanical Keyboard,Gaming Keyboard,RGB Color Backlight,104 Key,Anti-Ghosting For Full Key,Blue Switches,Aluminum Chassis,Detachable wrist rest,PC,Computer, Laptop,BLACK (Black)EZDIY-FAB Sleeved Cable - Cable extension for power supply with extra-sleeved 24 PIN 8PIN 6PIN 4+4 PIN With COMBS- Black Grey

pcpartpicker: https://pcpartpicker.com/user/resdal42/saved/sCW6XL

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5 minutes ago, IAnthonyFX said:

if your fan is 3 pin use a 3 pin splitter (if needed) for the 3 pin header.
if your fan is/pump etc are 4 pin, use you 4 pin splitter in a 4 pin header

That's the thing - I'm currently doing this, but the side panel fan is not having its speeds reduced

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If the header you're powering the fans is using pwm, then it will be using 12v which means 100% rpm for 3pin fans are are controlled using variable voltage. 

Group your 3pin fans and 4pin fans to separate headers.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
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It should work if you are powering both from 3pin header. But the issue might be that you are making power adjustments based on pumps speed (splitters end with all 3 pins).

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13 hours ago, WoodenMarker said:

If the header you're powering the fans is using pwm, then it will be using 12v which means 100% rpm for 3pin fans are are controlled using variable voltage. 

Group your 3pin fans and 4pin fans to separate headers.

 

10 hours ago, LoGiCalDrm said:

It should work if you are powering both from 3pin header. But the issue might be that you are making power adjustments based on pumps speed (splitters end with all 3 pins).

I've put both fans (3 pin) on the same header while the pump is now on a 4 pin, sadly still no luck. Do you suppose I can just hook the fan to the PSU with a molex while the fans are connected to the headers?

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52 minutes ago, evirth said:

 

I've put both fans (3 pin) on the same header while the pump is now on a 4 pin, sadly still no luck. Do you suppose I can just hook the fan to the PSU with a molex while the fans are connected to the headers?

Connecting directly to PSU would remove any possibility of changing speeds. Which mobo is this?

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2 hours ago, evirth said:

I've put both fans (3 pin) on the same header while the pump is now on a 4 pin, sadly still no luck. Do you suppose I can just hook the fan to the PSU with a molex while the fans are connected to the headers?

What motherboard are you using? Is there an option to set the fan header with the 3pin fans to dc as opposed to pwm?

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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7 minutes ago, evirth said:

AS Rock H110M HDV 

Both headers are 4 pin;I believe I stated the chassis header was 3 pin (sorry)

Make sure you're looking at the motherboard settings in Advanced mode and not EZ mode. Check to see if there's an option to set the fan header to DC and not PWM. 

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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Just now, WoodenMarker said:

Make sure you're looking at the motherboard settings in Advanced mode and not EZ mode. Check to see if there's an option to set the fan header to DC and not PWM. 

yeah advanced mode allows me to change fan speeds

but sure, I'll check if I can see if it can be changed to DC

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