Help Slowing Down Case Fans

MK4512 · Nov 7, 2009

So I got a 2 cooler master LED fans for my case, and installed them. Unfortunately they run quite loud, is there anyway I can lower their speed?

Also, they are connected directly to the power supply, not the mobo.

Motherboard AOD790GX

Thanks

Meow9000 · Nov 7, 2009

You can buy some pre-made resistor to drop it from 12v to 5v that plug in between the psu and fan but i dont see them often over here in the uk. You could always drop round your local hardware/electronics strore and make some yourself if you have the tools and knowledge.

theonedub · Nov 7, 2009

Do the old fashion mod by swapping the wires in the molex plug. Here is a thread with pictures. I prefer the 5v, as there is no issues like the 7v mod may have. The fans slow down a lot though= low cfm.

thread here http://www.ocforums.com/showthread.php?t=372297

kenkickr · Nov 7, 2009

theonedub said:
Do the old fashion mod by swapping the wires in the molex plug. Here is a thread with pictures. I prefer the 5v, as there is no issues like the 7v mod may have. The fans slow down a lot though= low cfm.

thread here http://www.ocforums.com/showthread.php?t=372297

+1. That is the cheapest way but just as effective. Also doesn't require much work.

TheLaughingMan · Nov 7, 2009

If they are connected directly to the PSU, no. The third wire on the fan plugs for the mobo is the fan voltrage control line. If your fan has power from the PSU and a separate line (just that yellow third wire) you can connect it to the mobo and use a software fan control.

And my late post stands corrected.

choppy · Nov 7, 2009

google '7v fan mod' - straightforward mod, even I managed to do it lol

MK4512 · Nov 8, 2009

Thanks alot guys, performed the mod worked fine.

System Name	MK4512's Computer
Processor	Phenom II X3 720 @3.4GHz
Motherboard	ASRock AOD790GX
Cooling	Artic Cooling Freezer 64 Pro
Memory	4 GB GSkill DDR2 800 RAM @4-4-4-12
Video Card(s)	Sapphire Radeon 4890
Storage	500GB Seagate
Display(s)	22" Philips 1920x1080
Case	Antec 300 (w/ New LED Fans!)
Power Supply	600w OCZ XStream Modular PSU
Software	Windows 7

Processor	AMD PHENOM 9950BE x4 (140W)
Motherboard	ASUS CROSSHAIR II (BIOS 2003)
Cooling	ZALMAN 9700L
Memory	4GB CORSAIR DOMINATOR 1066 (2x2GB)
Video Card(s)	XFX 9600GT XXX (740/1000)
Storage	WD250x2 RAID0/Maxtor 500GB STORAGE
Display(s)	SAMSUNG 23"/ACER 20"
Case	COOLMASTER 690 CUSTOM
Audio Device(s)	SUPREME FX II
Power Supply	OCZ 700W
Software	WINDOWS 7 64

System Name	Erakith \|\| AsRock NUCS
Processor	AMD ThreadRipper 2990WX ES (32c/64t 3.5ghz@1.02v) \|\| Intel i7 1360P Raptor Lake-P
Motherboard	MSI X399 MEG Creation \|\| AsRock OE
Cooling	EK Supremacy TR4 Full Nickel, D5 w/ EK Top, 2X EK-CoolStream XTX 360 & Photon 270 Res \|\| OE
Memory	32GB (4x8GB) Corsair Vengeance PRO RGB DDR4 3000\|\| 2x16GB Corsair DDR4
Video Card(s)	Vega 64 EK FC\|\| Intel Iris Xe
Storage	250gb WD Black NVMe & (2) 2TB Intel 660p NVMe \|\| 2TB Corsair MP600 Pro
Display(s)	34" Dell Ultrasharp U3415W
Case	CaseLabs Merlin SM8 \|\| Aluminum Unibody
Power Supply	Corsair HX1000
Mouse	Corsair Harpoon Wireless RGB
Keyboard	Corsair Strafe RGB w/ Cherry MX Silent
Software	Windows 10 Pro x64 \|\| WIndows 11 Pro x64
Benchmark Scores	WCG & F@H Only

System Name	Addison Clark
Processor	Ryzen 9 7950x3D delid
Motherboard	Asus X670E Hero
Cooling	Custom Bykski loop CPU, GPU, 2x 360 rads, and 1x 280 rad with Arctic P12 and P14 ARGB fans
Memory	G.Skill DDR5-6000 64GB CL30
Video Card(s)	Gigabyte 4090 Aorus Master
Storage	Kingston Fury 2TB and 4TB NVME
Display(s)	Samsung 57"
Case	Lian Li O11 mini
Audio Device(s)	Onboard
Power Supply	Thermaltake 1000w SFX-L
Mouse	Corsair Dark Core RGB SE
Keyboard	Corsair K95 Platnium
Software	Win 11 Pro

System Name	ODIN
Processor	AMD Ryzen 7 5800X
Motherboard	Gigabyte B550 Aorus Elite AX V2
Cooling	Dark Rock 4
Memory	G Skill RipjawsV F4 3600 Mhz C16
Video Card(s)	MSI GeForce RTX 3080 Ventus 3X OC LHR
Storage	Crucial 2 TB M.2 SSD :: WD Blue M.2 1TB SSD :: 1 TB WD Black VelociRaptor
Display(s)	Dell S2716DG 27" 144 Hz G-SYNC
Case	Fractal Meshify C
Audio Device(s)	Onboard Audio
Power Supply	Antec HCP 850 80+ Gold
Mouse	Corsair M65
Keyboard	Corsair K70 RGB Lux
Software	Windows 10 Pro 64-bit
Benchmark Scores	I don't benchmark.

Help Slowing Down Case Fans

MK4512

New Member

Meow9000

theonedub

habe fidem

kenkickr

TheLaughingMan

choppy

MK4512

New Member

Processor	Intel Core 2 Duo E7200 3.40GHz (400x8.5)
Motherboard	Gigabyte GA-EP45-UD3P Rev 1.1
Cooling	Xigmatek HDT-S1283
Memory	2x Crucial Ballistix DDR2 2GB 4:5 @ 500MHz 5-5-5-15
Video Card(s)	Asus GTX 560Ti 1GB TOP Edition
Storage	Crucial M4 128GB SSD + WD Black 500GB WD5001AALS
Display(s)	Samsung P2370HD @ 1920x1080 60Hz
Case	Antec 300
Audio Device(s)	Soundblaster Live! 24-bit w/ Creative Inspire T6060 5.1 200W
Power Supply	CoolerMaster Silent Pro Gold 600w
Software	Windows 7 Professional Edition SP1 64-bit