Overclock.net › Forums › Graphics Cards › NVIDIA › 4 pin fan plug as power for led
New Posts  All Forums:Forum Nav:

4 pin fan plug as power for led

post #1 of 14
Thread Starter 
Does anyone know which pins are positive and negative so I can use it as a power source for my LED? The board doesn't have a + - sign, and the fan cables are not color coded. The card is a gtx 295. I will be plugging a two pin cable (black and red)

Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
post #2 of 14
LEDs use a lower voltage than that fan in most cases. What are the specs of the LED?
Ex-Kentsfield rig
(20 items)
 
Q6600 RIG :D
(9 items)
 
 
CPUMotherboardGraphicsRAM
4790k MSI Z97M Gaming 780 Ti SLi Corsair Vengeance pro 2x8GB 
Hard DriveHard DriveCoolingOS
Seagate NAS 240GB m500s RAID 0 MCP 350 w/ res top >> MCP655 >> Heatkiller full... Windows 8.1 
MonitorKeyboardPowerCase
3X QNIX 2560x1440 @ 110Hz G910 EVGA Supernova 1000 G2 Stacker 830 
MouseMouse PadAudioAudio
G402 / Deathadder 2K13 League of legends one, cloth ODAC >> O2 >> HD800 / K702s Samson mediaone 5as 
AudioOtherOtherOther
Samson GoMic Asus wireless AC Logitech G27 Logitech C920 Webcam 
CPUMotherboardGraphicsRAM
Q6600 Asus P5Q-E 8800GTX Crucial Ballistix Tracers 
Hard DriveCoolingOSPower
320GB Samsung spintpoint T166 Xigmatek Dark Knight 7 Chieftec 390W :p 
Case
Some generic chieftec one for now 
  hide details  
Reply
Ex-Kentsfield rig
(20 items)
 
Q6600 RIG :D
(9 items)
 
 
CPUMotherboardGraphicsRAM
4790k MSI Z97M Gaming 780 Ti SLi Corsair Vengeance pro 2x8GB 
Hard DriveHard DriveCoolingOS
Seagate NAS 240GB m500s RAID 0 MCP 350 w/ res top >> MCP655 >> Heatkiller full... Windows 8.1 
MonitorKeyboardPowerCase
3X QNIX 2560x1440 @ 110Hz G910 EVGA Supernova 1000 G2 Stacker 830 
MouseMouse PadAudioAudio
G402 / Deathadder 2K13 League of legends one, cloth ODAC >> O2 >> HD800 / K702s Samson mediaone 5as 
AudioOtherOtherOther
Samson GoMic Asus wireless AC Logitech G27 Logitech C920 Webcam 
CPUMotherboardGraphicsRAM
Q6600 Asus P5Q-E 8800GTX Crucial Ballistix Tracers 
Hard DriveCoolingOSPower
320GB Samsung spintpoint T166 Xigmatek Dark Knight 7 Chieftec 390W :p 
Case
Some generic chieftec one for now 
  hide details  
Reply
post #3 of 14
do you have a multimeter? pics of the backside would help if you don't.

I'm guessing the ground is on one of the sides, but there's no real way to tell without tracing the circuit or using a multimeter, and a multimeter is a lot easier.

edit: I want to say the pin on the left (with the arrow pointing at it) is the ground, based solely on educated guesswork
Renaissance
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 4790K GA-Z97n-Gaming 5 HIS 7850 Mushkin Blackline 2x8GB DDR3 2133 
Hard DriveCoolingOSCase
Corsair GS 240 Corsair H50 Windows 8.1 Lian-li PC-Q08R 
Mouse
Razer Deathadder 3500dpi 
  hide details  
Reply
Renaissance
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 4790K GA-Z97n-Gaming 5 HIS 7850 Mushkin Blackline 2x8GB DDR3 2133 
Hard DriveCoolingOSCase
Corsair GS 240 Corsair H50 Windows 8.1 Lian-li PC-Q08R 
Mouse
Razer Deathadder 3500dpi 
  hide details  
Reply
post #4 of 14
If you can 'logically' match the jack up with a 4-pin fan plug (i.e. you know which side is 'up'), you could probably assume that the pin matching the position of the red wire is the 12+, and the black is the 12-. The other two wires on a four-pin are PWM (blue is it?) and fan sensor (yellow).
    
CPUMotherboardGraphicsRAM
xeon X5675 6-core @ 4.1ghz (1.29v, 20x205 +ht ) rampage iii extreme msi rx470 gaming X (the $159 budget king) 3 x 2gb corsair xms3 pc12800 (9-9-9-24-1T@1600MHz) 
Hard DriveOptical DriveCoolingOS
hynix 250gb ssd (boot), 2tb deskstar (apps),1tb... plextor px-712sa - still the best optical drive... corsair h8o v2 aio W10 home 
MonitorPowerCaseAudio
asus vw266h 25.5" (1920x1200) abs sl (enermax revolution) * single 70A rail 850w silverstone rv-03 XFi Titanium 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
xeon X5675 6-core @ 4.1ghz (1.29v, 20x205 +ht ) rampage iii extreme msi rx470 gaming X (the $159 budget king) 3 x 2gb corsair xms3 pc12800 (9-9-9-24-1T@1600MHz) 
Hard DriveOptical DriveCoolingOS
hynix 250gb ssd (boot), 2tb deskstar (apps),1tb... plextor px-712sa - still the best optical drive... corsair h8o v2 aio W10 home 
MonitorPowerCaseAudio
asus vw266h 25.5" (1920x1200) abs sl (enermax revolution) * single 70A rail 850w silverstone rv-03 XFi Titanium 
  hide details  
Reply
post #5 of 14
Thread Starter 
I got it from koolance, it's a 2 piece 3mm led with 4 pin molex connector. This is going to my vid-nx295 block which originally has LED connected to the fan connector but this block I bought from a person didn't come with those accessories so I'm making my own LED.

@zhoob: unfortunately I don't have a multimeter, the back doesn't provide any helpful info but here I provided a picture

Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
post #6 of 14
Quote:
Originally Posted by brettjv View Post
If you can 'logically' match the jack up with a 4-pin fan plug (i.e. you know which side is 'up'), you could probably assume that the pin matching the position of the red wire is the 12+, and the black is the 12-. The other two wires on a four-pin are PWM (blue is it?) and fan sensor (yellow).
he said the fan wires are all the same color, but I'm now ~90% certain the pin with the arrow is the ground and the one next to it is +12v. after that is the tach sensor and finally the pwm signal.

but personally, I wouldn't be messing with it without a multimeter. they're cheap and infinitely useful.
Renaissance
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 4790K GA-Z97n-Gaming 5 HIS 7850 Mushkin Blackline 2x8GB DDR3 2133 
Hard DriveCoolingOSCase
Corsair GS 240 Corsair H50 Windows 8.1 Lian-li PC-Q08R 
Mouse
Razer Deathadder 3500dpi 
  hide details  
Reply
Renaissance
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 4790K GA-Z97n-Gaming 5 HIS 7850 Mushkin Blackline 2x8GB DDR3 2133 
Hard DriveCoolingOSCase
Corsair GS 240 Corsair H50 Windows 8.1 Lian-li PC-Q08R 
Mouse
Razer Deathadder 3500dpi 
  hide details  
Reply
post #7 of 14
Thread Starter 
Quote:
Originally Posted by brettjv View Post
If you can 'logically' match the jack up with a 4-pin fan plug (i.e. you know which side is 'up'), you could probably assume that the pin matching the position of the red wire is the 12+, and the black is the 12-. The other two wires on a four-pin are PWM (blue is it?) and fan sensor (yellow).
I tried fitting the plug into the fin but the plug as bit thicker so I had to do some sanding then I got it through. I tried to turn it on the but the two pin "FAN" (from an old gpu) i plugged it didn't run so I was assuming the pins did not match
Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
post #8 of 14
For a 4-pin fan connector, pin 1 is black (GND) which is always on the edge and the pin next to it is pin 2 (red or yellow).

Reference link:http://www.allpinouts.org/index.php/...U%29_4_Pin_Fan

Pic 1 below shows 8800GTX's fan header while pic 2 shows GTX295's fan header. Compare the 2 and the conclusion is below.

Conclusion: the blue arrow points to the black (GND) while the next one is the red (see pic 3).



Edited by windfire - 4/22/11 at 7:55pm
post #9 of 14
Thread Starter 
Quote:
Originally Posted by windfire View Post
For a 4-pin fan connector, pin 1 is black (GND) which is always on the edge and the pin next to it is pin 2 (red or yellow).

Reference link:http://www.allpinouts.org/index.php/...U%29_4_Pin_Fan

Pic 1 below shows 8800GTX's fan header while pic 2 shows GTX295's fan header. Compare the 2 and the conclusion is below.

Conclusion: the blue arrow points to the black (GND) while the next one is the red (see pic 3).

So the opposite end of the arrow is the ground? Sort of the opposite of what zhoob suggested?
Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
Silent White
(17 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 1700 Asrock X370 Taichi Nvida Titan X (2016 Pascal) G.Skill Trident-Z 3200mhz 16gb 
Hard DriveCoolingCoolingCooling
Samsung 960 EVO NVME EKWB Supremacy EVO Full Nickel EKWB Titan X Nickel/Acetal Hardwarelabs Black Ice GTS360 x 2 
CoolingOSMonitorKeyboard
Corsair SP120 Performance Editions PWM x 6 Windows 10 PRO Asus PG279Q Corsair STRAFE RGB MX BROWNS 
PowerCaseMouseMouse Pad
EVGA Supernova 850 G3 Phanteks Evolv ATX Corsair M65 Corsair MM300 
Audio
Logitech G930 Wireless Headphones 
  hide details  
Reply
post #10 of 14
Quote:
Originally Posted by bl1tzk1213g View Post
So the opposite end of the arrow is the ground? Sort of the opposite of what zhoob suggested?
If I understand zhoob correctly, he and I are saying the same thing. He is saying the pin with an arrow pointing to it (see red circle in pic below). I am saying the pin pointed by my blue arrows.

(However, as the pic of 8800GTX shows, the white triangle arrow is likely not an indicator for the GND position.)

But, of course, the most certain way is to use a multimeter.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: NVIDIA
Overclock.net › Forums › Graphics Cards › NVIDIA › 4 pin fan plug as power for led