Overclock.net › Forums › Cooling › Water Cooling › 3 pin or 4 pin fans
New Posts  All Forums:Forum Nav:

3 pin or 4 pin fans

post #1 of 11
Thread Starter 
what is better 3 pin or 4 pin fans for water cooling
post #2 of 11
dosent make any difference its the speed and airflow you need to look at , 3pins are easyer to be used with a fan controller or what ever your using
Lian Li (Custom)
(13 items)
 
  
CPUMotherboardGraphicsRAM
2500k @ 4.8Ghz ASUS P8Z68 4890 (920Mhz) Corsair DDR3 
Hard DriveOptical DriveOSMonitor
Samsung 1TB F1 + Mushkin 40Gbb SSD USB Windows 7 X64 LG 24" 
KeyboardPowerCaseMouse
G15 V2 Corsair 650w Lian Li PC-A7F (Custom) Razer Lanches 
Mouse Pad
None 
  hide details  
Reply
Lian Li (Custom)
(13 items)
 
  
CPUMotherboardGraphicsRAM
2500k @ 4.8Ghz ASUS P8Z68 4890 (920Mhz) Corsair DDR3 
Hard DriveOptical DriveOSMonitor
Samsung 1TB F1 + Mushkin 40Gbb SSD USB Windows 7 X64 LG 24" 
KeyboardPowerCaseMouse
G15 V2 Corsair 650w Lian Li PC-A7F (Custom) Razer Lanches 
Mouse Pad
None 
  hide details  
Reply
post #3 of 11
four pin is for PWM, which fluctuates depending on temp.



3 pin is just normal, stays the same speed. (well 4 pin does too if you turn off the PWM function in the BIOS)
post #4 of 11
4 Pin allows you to control the RPM
3 Just spins at the set RPM

I run 3 Pin ones. I don't think it really matters though, unless you really care about noise and tuning the fans. If you do, you could always just get a fan controller
-Sean
    
CPUMotherboardGraphicsRAM
i7 3770k Gigabyte Z77-UD5H-WB Golden GTX 670 Windforce 3X 2 x 4GB GSkill RipJawsX 
Hard DriveCoolingOSMonitor
OCZ Vertex 4 64GB- WD Caviar Black 1TB Noctua NH-D14 Windows 7 Dell U2311H IPS 
KeyboardPowerCaseMouse
xArmor iOne U9BL MX Blues Seasonic x750 LIAN LI PC-T60B Logitech G500 
Audio
Modded JVC HA-RX900 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 3770k Gigabyte Z77-UD5H-WB Golden GTX 670 Windforce 3X 2 x 4GB GSkill RipJawsX 
Hard DriveCoolingOSMonitor
OCZ Vertex 4 64GB- WD Caviar Black 1TB Noctua NH-D14 Windows 7 Dell U2311H IPS 
KeyboardPowerCaseMouse
xArmor iOne U9BL MX Blues Seasonic x750 LIAN LI PC-T60B Logitech G500 
Audio
Modded JVC HA-RX900 
  hide details  
Reply
post #5 of 11
If you have a really powerful fan and noise is a concern then PWM is a great way to go since you can control the fan either with BIOS or a program like SpeedFan, and if you don't fold then 90% of the time the fan only needs to run at 20% or so to keep your temperatures nice. Cuts down noise and increases fan life!
Blackbird
(13 items)
 
  
CPUMotherboardGraphicsRAM
PhII X4 955BE @3.78GHz ASUS M4A79XTD EVO EVGA GTS250 1024mb 256-bit 2x2gb G.Skill Ripjaws DDR3 1600 CL7 
Hard DriveOptical DriveOSMonitor
2x160 raid0 (OS), 1x500 (home), 1x1.5 (storage) Lite-on DVD-RW Win7Pro64 ASUS 22.5" 2ms 1920x1080 
KeyboardPowerCaseMouse
Dell, $5 used Corsair 750W Coolermaster Scout Microsoft, $5 used 
Mouse Pad
Desk 
  hide details  
Reply
Blackbird
(13 items)
 
  
CPUMotherboardGraphicsRAM
PhII X4 955BE @3.78GHz ASUS M4A79XTD EVO EVGA GTS250 1024mb 256-bit 2x2gb G.Skill Ripjaws DDR3 1600 CL7 
Hard DriveOptical DriveOSMonitor
2x160 raid0 (OS), 1x500 (home), 1x1.5 (storage) Lite-on DVD-RW Win7Pro64 ASUS 22.5" 2ms 1920x1080 
KeyboardPowerCaseMouse
Dell, $5 used Corsair 750W Coolermaster Scout Microsoft, $5 used 
Mouse Pad
Desk 
  hide details  
Reply
post #6 of 11
Basically repeating what everybody else said... four pins allow you to control it from software.

You can still control three pin from hardware via voltage if you want to. You either plug it into a fan controller, or molex it, and mod the wire so it's 12v, 7v, or 5v.
    
CPUMotherboardGraphicsRAM
i7 920 4.0  Gigabyte UD3R 4890 6GB 1600 
Hard DriveOptical DriveMonitorKeyboard
Force 120 Yeah right... 24" IPS HHKB 
PowerCaseMouse
PCPC Silencer 610 Mac Pro Magic Trackpad 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 920 4.0  Gigabyte UD3R 4890 6GB 1600 
Hard DriveOptical DriveMonitorKeyboard
Force 120 Yeah right... 24" IPS HHKB 
PowerCaseMouse
PCPC Silencer 610 Mac Pro Magic Trackpad 
  hide details  
Reply
post #7 of 11
i'm confused.. 4pin = molex right? how does connecting a fan to a molex cable let you control the speed in the bios? it's not even going through the motherboard in any way o_o

anyway I have a question too, my fans have small 3pin connectors and optional molex connectors, if I use the 3pin connectors and hook it up to my cases fan speed controller, will they run slower than if I just used the molex connectors, even if the controller is set to max?
post #8 of 11
Quote:
Originally Posted by Xraven771 View Post
dosent make any difference its the speed and airflow you need to look at , 3pins are easyer to be used with a fan controller or what ever your using
acculy with watercooling (or aircooling for that matter) you need to look at the noise level and static pressure as a high cfm fast spinning fan is worthless unless it has high static pressure which is the ability to push air though contricted spaces such as a heatsink or rad.
Silent Dominator
(28 items)
 
Classy Lady
(26 items)
 
TUF Inside
(18 items)
 
  hide details  
Reply
Silent Dominator
(28 items)
 
Classy Lady
(26 items)
 
TUF Inside
(18 items)
 
  hide details  
Reply
post #9 of 11
Quote:
Originally Posted by paradoxum View Post
i'm confused.. 4pin = molex right? how does connecting a fan to a molex cable let you control the speed in the bios? it's not even going through the motherboard in any way o_o

anyway I have a question too, my fans have small 3pin connectors and optional molex connectors, if I use the 3pin connectors and hook it up to my cases fan speed controller, will they run slower than if I just used the molex connectors, even if the controller is set to max?
PWM connectors have 4 pins, but look just like the 3-pin connectors. Nothing at all like the Molex connectors.



Ground, high, speed reading, and modulated signal for varying the speed.
Blackbird
(13 items)
 
  
CPUMotherboardGraphicsRAM
PhII X4 955BE @3.78GHz ASUS M4A79XTD EVO EVGA GTS250 1024mb 256-bit 2x2gb G.Skill Ripjaws DDR3 1600 CL7 
Hard DriveOptical DriveOSMonitor
2x160 raid0 (OS), 1x500 (home), 1x1.5 (storage) Lite-on DVD-RW Win7Pro64 ASUS 22.5" 2ms 1920x1080 
KeyboardPowerCaseMouse
Dell, $5 used Corsair 750W Coolermaster Scout Microsoft, $5 used 
Mouse Pad
Desk 
  hide details  
Reply
Blackbird
(13 items)
 
  
CPUMotherboardGraphicsRAM
PhII X4 955BE @3.78GHz ASUS M4A79XTD EVO EVGA GTS250 1024mb 256-bit 2x2gb G.Skill Ripjaws DDR3 1600 CL7 
Hard DriveOptical DriveOSMonitor
2x160 raid0 (OS), 1x500 (home), 1x1.5 (storage) Lite-on DVD-RW Win7Pro64 ASUS 22.5" 2ms 1920x1080 
KeyboardPowerCaseMouse
Dell, $5 used Corsair 750W Coolermaster Scout Microsoft, $5 used 
Mouse Pad
Desk 
  hide details  
Reply
post #10 of 11
Forget the 4-pin fans if you have a fan controller. The fan controller can regulate the fan speed of 2-pin and 3-pin fans. 4-pin fans just cost more otherwise.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon 64 x2 5000 Black 2.6Ghz OC 3.3Ghz GigaByte GA-MA78GM-S2H Full Radeon 780G HD 3200 4GB Corsair DDR2 6400C4 
Hard DriveOSPowerCase
Seagate Barracuda 750GB 7200 RPM 32MB Cache Windows 7 Pro x64 Corsair HX620W Meridian XClio High Tower I 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon 64 x2 5000 Black 2.6Ghz OC 3.3Ghz GigaByte GA-MA78GM-S2H Full Radeon 780G HD 3200 4GB Corsair DDR2 6400C4 
Hard DriveOSPowerCase
Seagate Barracuda 750GB 7200 RPM 32MB Cache Windows 7 Pro x64 Corsair HX620W Meridian XClio High Tower I 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Water Cooling
Overclock.net › Forums › Cooling › Water Cooling › 3 pin or 4 pin fans