• We've upgraded our forums. Please post any issues/requests in this thread.

Fans with 4 pins

Joined
May 14, 2009
Messages
2,132 (0.68/day)
Likes
477
Location
Chicago burbs
System Name Halloween Boo!
Processor Intel Core i7 3770K
Motherboard Gigabyte Z77-Up7
Cooling Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory 16G G.Skill trident 2400MHz
Video Card(s) 3 x Radeon 7970
Storage OCZ Revo Drive 240G
Display(s) 24 inch Viewsonic
Case Phobia WayCoolIt Test Bench
Power Supply Nexus 1100 watt
#26
The 4 pin headers are for PWM(Pulse Width modulation). Fans with 4 pins automatically adjust to the system needs.
 
Joined
Mar 11, 2007
Messages
681 (0.17/day)
Likes
83
Processor AMD Phenom II x6 1090T @ 3.8GHz
Motherboard ASUS Sabertooth 990FX
Cooling Corsair H80i GTX
Memory Patriot Gamer 2 Series 8GB DDR3-1600
Video Card(s) XFX Radeon RX 460 4GB
Storage 1TB WD Red
Display(s) 1920x1080 HDTV
Case NZXT Phantom 240
Power Supply Corsair CX750M 750w
Software Win7 Professional though I hate it, I want XP back!
#27
The 4 pin headers are for PWM(Pulse Width modulation). Fans with 4 pins automatically adjust to the system needs.
The fans don't do anything.

You make it sound like just plugging in a 4-pin fan will instantly provide the amount of cooling the system needs, like the fan it intelligent enough to do that.

The fans are dumb, the motherboard has to control them, it is the motherboard that adjust the fans to it's needs.

And most of the time, except for the CPU fan connector, you have to go into the BIOS and tell the motherboard to control the speed of the fans before it will use PWM.
 
Joined
Jan 21, 2013
Messages
3,800 (2.12/day)
Likes
1,320
System Name Out of the game..
Benchmark Scores d1nky@hwbot.org
#28
Joined
May 14, 2009
Messages
2,132 (0.68/day)
Likes
477
Location
Chicago burbs
System Name Halloween Boo!
Processor Intel Core i7 3770K
Motherboard Gigabyte Z77-Up7
Cooling Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory 16G G.Skill trident 2400MHz
Video Card(s) 3 x Radeon 7970
Storage OCZ Revo Drive 240G
Display(s) 24 inch Viewsonic
Case Phobia WayCoolIt Test Bench
Power Supply Nexus 1100 watt
#29
The fans don't do anything.

You make it sound like just plugging in a 4-pin fan will instantly provide the amount of cooling the system needs, like the fan it intelligent enough to do that.

The fans are dumb, the motherboard has to control them, it is the motherboard that adjust the fans to it's needs.

And most of the time, except for the CPU fan connector, you have to go into the BIOS and tell the motherboard to control the speed of the fans before it will use PWM.
Do you make a living trying to prove people wrong? 4 pin fan must plug into 4 pin header Cartman and most of us know PWM is a function of the board but thanks for your utmost knowledge.

this is getting a bit off subject, the guy wanted to know if he could run a 3pin on a 4pin.

my understanding is most boards and newer boards are backwards compatible allowing voltage control changes through 4pin header to 3pin fans, whereas pwm adjusts fan speed without changing volts.

http://en.wikipedia.org/wiki/Pulse-width_modulation
http://en.wikipedia.org/wiki/Fan_control
Sorry d1nky off topic but 3 pin fans can plug into 4 pin headers but no pulse width modulation but they can be controlled through the bios.
 
Last edited:
Joined
Mar 11, 2007
Messages
681 (0.17/day)
Likes
83
Processor AMD Phenom II x6 1090T @ 3.8GHz
Motherboard ASUS Sabertooth 990FX
Cooling Corsair H80i GTX
Memory Patriot Gamer 2 Series 8GB DDR3-1600
Video Card(s) XFX Radeon RX 460 4GB
Storage 1TB WD Red
Display(s) 1920x1080 HDTV
Case NZXT Phantom 240
Power Supply Corsair CX750M 750w
Software Win7 Professional though I hate it, I want XP back!
#30
Do you make a living trying to prove people wrong? 4 pin fan must plug into 4 pin header Cartman and most of us know PWM is a function of the board but thanks for your utmost knowledge.
Here we go again.

You post incorrect information, then argue and insult anyone that corrects you.

Is this how you pay your bills?
 
Joined
May 14, 2009
Messages
2,132 (0.68/day)
Likes
477
Location
Chicago burbs
System Name Halloween Boo!
Processor Intel Core i7 3770K
Motherboard Gigabyte Z77-Up7
Cooling Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory 16G G.Skill trident 2400MHz
Video Card(s) 3 x Radeon 7970
Storage OCZ Revo Drive 240G
Display(s) 24 inch Viewsonic
Case Phobia WayCoolIt Test Bench
Power Supply Nexus 1100 watt
#31
Here we go again.

You post incorrect information, then argue and insult anyone that corrects you.

Is this how you pay your bills?
It is not incorrect forum mascot
 

AsRock

TPU addict
Joined
Jun 23, 2007
Messages
15,314 (4.00/day)
Likes
4,724
Location
US
Processor 2500k \ 3770k
Motherboard ASRock Z68 \ Z77
Memory Samsung low profile 1600
Video Card(s) XFX 6770 \ XFX R9 290X
Storage Intel 80Gb (SATA2) WD 250Gb \ Team SSD+Samsung Evo 250Gb+500Gb+ 2xCorsair Force+WD250GbHDD
Display(s) Samsung 1080P \ Toshiba HDTV 1080P
Case HTPC400 \ Thermaltake Armor case ( original ), With Zalman fan controller ( wattage usage ).
Audio Device(s) Yamaha RX-V475 \ Marantz SR5008 Tannoy Mercury MKII Paradigm 5SE + Tannoy Mercury F4
Power Supply PC&Power 750w \ Seasonic 750w MKII
Mouse MS intelimouse \ Logitech G700s + Steelseries Sensei wireless
Keyboard Logitech K120 \ ROCCAT MK Pro ( modded amber leds )
Benchmark Scores Meh benchmarks.
#32
speedfan is an epic fail on most new motherboards.


Most manufacturers will bundle their H/W monitoring software with it.
ASRock provides a really good one.


http://img.techpowerup.org/130518/axtu.png
i can control all the fans on my motherboard.
Best part of the ASRock software is that you set them at max in bios and you can turn the temps controlled ones right down and if the min temp is reached it will automatically speed the fans up.
 
Joined
May 14, 2009
Messages
2,132 (0.68/day)
Likes
477
Location
Chicago burbs
System Name Halloween Boo!
Processor Intel Core i7 3770K
Motherboard Gigabyte Z77-Up7
Cooling Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory 16G G.Skill trident 2400MHz
Video Card(s) 3 x Radeon 7970
Storage OCZ Revo Drive 240G
Display(s) 24 inch Viewsonic
Case Phobia WayCoolIt Test Bench
Power Supply Nexus 1100 watt
#33
Best part of the ASRock software is that you set them at max in bios and you can turn the temps controlled ones right down and if the min temp is reached it will automatically speed the fans up.
Yes, ASRock's software rocks, I believe with Asus Q-fan does the same thing
 

Aquinus

Resident Wat-man
Joined
Jan 28, 2012
Messages
10,401 (4.84/day)
Likes
5,481
Location
Concord, NH
System Name Kratos
Processor Intel Core i7 3930k @ 4.2Ghz
Motherboard ASUS P9X79 Deluxe
Cooling Zalman CPNS9900MAX 130mm
Memory G.Skill DDR3-2133, 16gb (4x4gb) @ 9-11-10-28-108-1T 1.65v
Video Card(s) MSI AMD Radeon R9 390 GAMING 8GB @ PCI-E 3.0
Storage 2x120Gb SATA3 Corsair Force GT Raid-0, 4x1Tb RAID-5, 1x500GB
Display(s) 1x LG 27UD69P (4k), 2x Dell S2340M (1080p)
Case Antec 1200
Audio Device(s) Onboard Realtek® ALC898 8-Channel High Definition Audio
Power Supply Seasonic 1000-watt 80 PLUS Platinum
Mouse Logitech G602
Keyboard Rosewill RK-9100
Software Ubuntu 17.10
Benchmark Scores Benchmarks aren't everything.
#34
Yes, ASRock's software rocks, I believe with Asus Q-fan does the same thing
I've been fairly happy with what ASUS has to offer as far as fan control.
fanxpert.PNG
 
Joined
Mar 11, 2007
Messages
681 (0.17/day)
Likes
83
Processor AMD Phenom II x6 1090T @ 3.8GHz
Motherboard ASUS Sabertooth 990FX
Cooling Corsair H80i GTX
Memory Patriot Gamer 2 Series 8GB DDR3-1600
Video Card(s) XFX Radeon RX 460 4GB
Storage 1TB WD Red
Display(s) 1920x1080 HDTV
Case NZXT Phantom 240
Power Supply Corsair CX750M 750w
Software Win7 Professional though I hate it, I want XP back!
#35
It is not incorrect forum mascot
Yes it is incorrect, it is wrong to say that you just plug in the fan and it automatically adjusts to the systems needs.

A lot of motherboard require you change BIOS settings.
 
Joined
Dec 14, 2006
Messages
376 (0.09/day)
Likes
53
System Name Ed-PC
Processor Intel i5-3570k
Motherboard Asus P8Z77 V-Pro
Cooling CM 212 evo
Memory Crucial Ballistix Tactical Tracer DDR3 1600 8GB
Video Card(s) Nvidia MSI 660ti PE OC
Storage WD black 500gig
Case Corsair 500R
Audio Device(s) onboard
Power Supply Corsair 650TX V2
Software Win7 Pro 64bit
#36
FWIW , On Asus Z77 it only supports 3wire in the chassis headers where you can adjust in bios or 3rd party app . If you put 3 wire in the 4wire PWM CPU headers you get 100% fan speed, no adjustment .

The other chassis heads do support voltage and PWM fan types which can be adjusted in bios , fan expert or 3rd party apps .
 
Joined
May 14, 2009
Messages
2,132 (0.68/day)
Likes
477
Location
Chicago burbs
System Name Halloween Boo!
Processor Intel Core i7 3770K
Motherboard Gigabyte Z77-Up7
Cooling Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory 16G G.Skill trident 2400MHz
Video Card(s) 3 x Radeon 7970
Storage OCZ Revo Drive 240G
Display(s) 24 inch Viewsonic
Case Phobia WayCoolIt Test Bench
Power Supply Nexus 1100 watt
#37
Yes it is incorrect, it is wrong to say that you just plug in the fan and it automatically adjusts to the systems needs.

A lot of motherboard require you change BIOS settings.
The 4 pin headers are for PWM(Pulse Width modulation). Fans with 4 pins automatically adjust to the system needs.


Does this say to plug them into 3 pin header? No. As the first sentence says, 4 pin headers are PWM. Pulse Width Modulation automaticlly adjusts to the systems needs...... I think your not understanding the thought........Guess your trying to stir the kettle as usual. Maybe the statement was vague and like I mentioned, thank you for your untmost intelligence. It is much appreciated(not that it takes a rocket scientist to figure the statement out).
 
Joined
Mar 11, 2007
Messages
681 (0.17/day)
Likes
83
Processor AMD Phenom II x6 1090T @ 3.8GHz
Motherboard ASUS Sabertooth 990FX
Cooling Corsair H80i GTX
Memory Patriot Gamer 2 Series 8GB DDR3-1600
Video Card(s) XFX Radeon RX 460 4GB
Storage 1TB WD Red
Display(s) 1920x1080 HDTV
Case NZXT Phantom 240
Power Supply Corsair CX750M 750w
Software Win7 Professional though I hate it, I want XP back!
#38
Where are you getting that I'm saying anything about plugging them in to 3-pin headers?

You know a lot of boards have 4-pin headers for things other than the CPU right?

I'm not saying anything about plugging them into 3-pin headers.

I'm saying that just plugging the fans in, into 4-pin headers, doesn't make the fans automatically adjust to the systems needs.

The fans aren't magical, they won't just sense the needs of the system and adjust themselves.

The motherboard has to control them.

And a lot of the time you have to go into the BIOS and adjust the settings for those headers to make them actually use PWM because by default they are set to run at full speeds.
 
Joined
May 14, 2009
Messages
2,132 (0.68/day)
Likes
477
Location
Chicago burbs
System Name Halloween Boo!
Processor Intel Core i7 3770K
Motherboard Gigabyte Z77-Up7
Cooling Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory 16G G.Skill trident 2400MHz
Video Card(s) 3 x Radeon 7970
Storage OCZ Revo Drive 240G
Display(s) 24 inch Viewsonic
Case Phobia WayCoolIt Test Bench
Power Supply Nexus 1100 watt
#39
Where are you getting that I'm saying anything about plugging them in to 3-pin headers?

You know a lot of boards have 4-pin headers for things other than the CPU right?

I'm not saying anything about plugging them into 3-pin headers.

I'm saying that just plugging the fans in, into 4-pin headers, doesn't make the fans automatically adjust to the systems needs.
The fans aren't magical, they won't just sense the needs of the system and adjust themselves.

The motherboard has to control them.

And a lot of the time you have to go into the BIOS and adjust the settings for those


headers to make them actually use PWM because by default they are set to run at full speeds.
I think it is time to move on mascot.:slap:

You need to read up on motherboards with PWM son.

When the 4 pin fan was invented, it added the PWM logic signal. PWM travels
from the motherboard to the fan. It tells the fan how fast to run.(through the board)
http://www.formfactors.org/developer/specs/REV1_2_Public.pdf
 
Last edited:
Joined
Mar 11, 2007
Messages
681 (0.17/day)
Likes
83
Processor AMD Phenom II x6 1090T @ 3.8GHz
Motherboard ASUS Sabertooth 990FX
Cooling Corsair H80i GTX
Memory Patriot Gamer 2 Series 8GB DDR3-1600
Video Card(s) XFX Radeon RX 460 4GB
Storage 1TB WD Red
Display(s) 1920x1080 HDTV
Case NZXT Phantom 240
Power Supply Corsair CX750M 750w
Software Win7 Professional though I hate it, I want XP back!
#40
Sigh, see I was right, you post incorrect information then argue with and insult anyone that corrects you.

I'm not arguing how PWM works.

I'm saying that a lot of the time just plugging the fan in won't enable PWM support, you have to enable it in the BIOS before the motherboard will use PWM.

Your original statement makes it sound like you just plug the fan in and it magically adjusts itself to the system needs, that isn't the case a lot of the time, there are extra steps involved.
 

Mindweaver

Moderato®™
Staff member
Joined
Apr 16, 2009
Messages
6,583 (2.08/day)
Likes
3,915
Location
Charleston, SC
System Name Sechs / EyeSeven
Processor i7 5820k @ 4.5ghz / i7 2600k @ 4.0Ghz
Motherboard X99S GAMING 7 / ASRock Z68 Extreme3 Gen3
Cooling CORSAIR Hydro Series H100i Extreme / Stock cooler... H50 leaked!..
Memory G.Skill DDR4 2800 16GB 4x4GB / G.Skill DDR3 1600 8gb 2x4GB
Video Card(s) PNY Quadro K2000 / MSI GTX 970 GAMING 4Gb
Storage Samsung 850 PRO 256GB SSD /Intel 240gb, corsair 120gb SSD, 3x 1 tb s storage
Display(s) 2x Acer G276HL 27" 1080p / 3x Acer 22" Nvidia surround
Case Phanteks “Enthoo Pro series”/ Cooler Master Storm Scout
Audio Device(s) Azalia Realtek ALC1150 / SB X-Fi Gamer
Power Supply Corsair CXM CX600M / Corsair 600w
Mouse Razer DeathAdder Chroma / Razer DeathAdder
Keyboard Razer BlackWidow Ultimate /
Software Windows 10 Pro x64 / Windows 10 Pro x64
#41
Hey guys (drdeathx and Eric_Cartman), the constant arguing between you two is not needed in the forum or something anyone want's to see. if you two can't resolve your issues then we/moderators will put an end to it. ;)
 
Joined
May 14, 2009
Messages
2,132 (0.68/day)
Likes
477
Location
Chicago burbs
System Name Halloween Boo!
Processor Intel Core i7 3770K
Motherboard Gigabyte Z77-Up7
Cooling Custom Water/ Thermalchill TA 120.3/ Swiftech Apogeee XT/ MCP655/ Swiftech M icrores/ XSPC RX 240
Memory 16G G.Skill trident 2400MHz
Video Card(s) 3 x Radeon 7970
Storage OCZ Revo Drive 240G
Display(s) 24 inch Viewsonic
Case Phobia WayCoolIt Test Bench
Power Supply Nexus 1100 watt
#42
hey guys (drdeathx and eric_cartman), the constant arguing between you two is not needed in the forum or something anyone want's to see. If you two can't resolve your issues then we/moderators will put an end to it. ;)
ty
 

Aquinus

Resident Wat-man
Joined
Jan 28, 2012
Messages
10,401 (4.84/day)
Likes
5,481
Location
Concord, NH
System Name Kratos
Processor Intel Core i7 3930k @ 4.2Ghz
Motherboard ASUS P9X79 Deluxe
Cooling Zalman CPNS9900MAX 130mm
Memory G.Skill DDR3-2133, 16gb (4x4gb) @ 9-11-10-28-108-1T 1.65v
Video Card(s) MSI AMD Radeon R9 390 GAMING 8GB @ PCI-E 3.0
Storage 2x120Gb SATA3 Corsair Force GT Raid-0, 4x1Tb RAID-5, 1x500GB
Display(s) 1x LG 27UD69P (4k), 2x Dell S2340M (1080p)
Case Antec 1200
Audio Device(s) Onboard Realtek® ALC898 8-Channel High Definition Audio
Power Supply Seasonic 1000-watt 80 PLUS Platinum
Mouse Logitech G602
Keyboard Rosewill RK-9100
Software Ubuntu 17.10
Benchmark Scores Benchmarks aren't everything.
#43
Most motherboards support both PWM and DC voltage control on 4-pin headers. This is a non-issue imho. I would only say that PWM is the better option and will have better and more smoother changes in fan speed as opposed to DC control, but they both work.

I'm saying that just plugging the fans in, into 4-pin headers, doesn't make the fans automatically adjust to the systems needs.
Yes and no, modern motherboards can and will, my current motherboard varies DC fans based on system temp by default. My last motherboard let you pick one or the other, my P9X79 Deluxe auto detects. You don't need PWM to sense how fast the fan is moving, that's the third pin on a regular fan. PWM only controls the output, but you already know that.
 
Last edited by a moderator:
Joined
Jul 11, 2010
Messages
140 (0.05/day)
Likes
47
Location
Finland
Processor i7-2500K @ 4.5 GHz
Motherboard Gigabyte GA-Z68XP-UD4
Cooling EK Supreme HF
Memory Kingston HyperX Genesis 2 * 4 GB
Video Card(s) Radeon HD 7950
Storage OCZ Agility 3
Case Bitfenix Shinobi XL
Power Supply Super Flower SF-700P14XE
#44
Most motherboards support both PWM and DC voltage control on 4-pin headers. This is a non-issue imho. I would only say that PWM is the better option and will have better and more smoother changes in fan speed as opposed to DC control, but they both work.



Yes and no, modern motherboards can and will, my current motherboard varies DC fans based on system temp by default. My last motherboard let you pick one or the other, my P9X79 Deluxe auto detects. You don't need PWM to sense how fast the fan is moving, that's the third pin on a regular fan. PWM only controls the output, but you already know that.
Your board seems to be same as my Asus boards, all headers are 4 pin headers but actually only cpu and cpu_opt fan headers output PWM signal, chassis fan headers support only voltage control even though they have 4-pin headers :

 
Joined
Dec 14, 2006
Messages
376 (0.09/day)
Likes
53
System Name Ed-PC
Processor Intel i5-3570k
Motherboard Asus P8Z77 V-Pro
Cooling CM 212 evo
Memory Crucial Ballistix Tactical Tracer DDR3 1600 8GB
Video Card(s) Nvidia MSI 660ti PE OC
Storage WD black 500gig
Case Corsair 500R
Audio Device(s) onboard
Power Supply Corsair 650TX V2
Software Win7 Pro 64bit
#45
Your board seems to be same as my Asus boards, all headers are 4 pin headers but actually only cpu and cpu_opt fan headers output PWM signal, chassis fan headers support only voltage control even though they have 4-pin headers :

http://i826.photobucket.com/albums/zz182/mm_67/Capture-4_zps555c9ae9.png
exactly , you "need" a PWM cpu fan if its HS and most bios have a standard profile for PWM that will ramp up speed with temps .
I would never buy HS w/0 PWM fan , but that is just me .