Overclock.net › Forums › Cooling › Air Cooling › help an undervolting noob
New Posts  All Forums:Forum Nav:

help an undervolting noob

post #1 of 6
Thread Starter 
Ordered some d12sh-12 yate's from petra's, they should be here Friday. What is the easiest SAFEST way to undervolt them down to 7v WITHOUT a fan controller. I know you pull some pin and put it in another slot, someone clear up this issue for a noob please and thanks.
Edited by Jonesey I7 - 12/29/10 at 8:37pm
    
CPUMotherboardGraphicsRAM
Evo VIII 475whp/405tq NONE BATTLEFIELD UNTIL 
Hard DrivePowerCase
COMES OUT!!!!! 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Evo VIII 475whp/405tq NONE BATTLEFIELD UNTIL 
Hard DrivePowerCase
COMES OUT!!!!! 
  hide details  
Reply
post #2 of 6
http://www.overclock.net/faqs/13386-...ervolting.html
    
CPUMotherboardGraphicsRAM
955 C3 3.8ghz GA-MA790X-UD4P Sapphire HD 4830 Samsung 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD Samsung F3 Sony DVD Burner S1283/Panaflo M1 
OSMonitorPowerCase
Windows 7 22" AOC 1920x1080 Corsair CX400 Antec 300 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
955 C3 3.8ghz GA-MA790X-UD4P Sapphire HD 4830 Samsung 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD Samsung F3 Sony DVD Burner S1283/Panaflo M1 
OSMonitorPowerCase
Windows 7 22" AOC 1920x1080 Corsair CX400 Antec 300 
  hide details  
Reply
post #3 of 6
Thread Starter 
Quote:
Originally Posted by tmunn View Post
I see on page two someone says put the 12v negative in the 5v slot. So take out the 5v completely leaving only 3 in the molex then?
    
CPUMotherboardGraphicsRAM
Evo VIII 475whp/405tq NONE BATTLEFIELD UNTIL 
Hard DrivePowerCase
COMES OUT!!!!! 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Evo VIII 475whp/405tq NONE BATTLEFIELD UNTIL 
Hard DrivePowerCase
COMES OUT!!!!! 
  hide details  
Reply
post #4 of 6
Just to clarify, do not mess with the PSU molex. You are going to swap wires on the fan molex. You can have all four wires in the molex, you are going to swap them around.

For 5V, the red fan wire goes to pin #4 (red), and the black fan wire goes to pin #2 or 3 (black).

For 7V, the red fan wire goes to pin #1 (yellow), and the black fan wire goes to pin #4 (red).

Also, do not do the 7V "trick" with a high power fan, it can damage your PSU. One Yate per molex should be fine.
Edited by tmunn - 12/29/10 at 9:23pm
    
CPUMotherboardGraphicsRAM
955 C3 3.8ghz GA-MA790X-UD4P Sapphire HD 4830 Samsung 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD Samsung F3 Sony DVD Burner S1283/Panaflo M1 
OSMonitorPowerCase
Windows 7 22" AOC 1920x1080 Corsair CX400 Antec 300 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
955 C3 3.8ghz GA-MA790X-UD4P Sapphire HD 4830 Samsung 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD Samsung F3 Sony DVD Burner S1283/Panaflo M1 
OSMonitorPowerCase
Windows 7 22" AOC 1920x1080 Corsair CX400 Antec 300 
  hide details  
Reply
post #5 of 6
Thread Starter 
Quote:
Originally Posted by tmunn View Post
Just to clarify, do not mess with the PSU molex. You are going to swap wires on the fan molex. You can have all four wires in the molex, you are going to swap them around.

For 5V, the red fan wire goes to pin #4 (red), and the black fan wire goes to pin #2 or 3 (black).

For 7V, the red fan wire goes to pin #1 (yellow), and the black fan wire goes to pin #4 (red).

Also, do not do the 7V "trick" with a high power fan, it can damage your PSU. One Yate per molex should be fine.
So I have 6 fans push/pull on my rad, I need to use 6 different molex's on my psu?
    
CPUMotherboardGraphicsRAM
Evo VIII 475whp/405tq NONE BATTLEFIELD UNTIL 
Hard DrivePowerCase
COMES OUT!!!!! 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Evo VIII 475whp/405tq NONE BATTLEFIELD UNTIL 
Hard DrivePowerCase
COMES OUT!!!!! 
  hide details  
Reply
post #6 of 6
Hmm, now that I think about it, forget the whole "per molex" comment. With six fans, you're going to want to -
a) run them at 5V
b) get a fan controller
c) find out how much current each one of your fan headers support, if it's 1.5A or more you should be able to put three fans per header and use Speed Fan to control them.
    
CPUMotherboardGraphicsRAM
955 C3 3.8ghz GA-MA790X-UD4P Sapphire HD 4830 Samsung 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD Samsung F3 Sony DVD Burner S1283/Panaflo M1 
OSMonitorPowerCase
Windows 7 22" AOC 1920x1080 Corsair CX400 Antec 300 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
955 C3 3.8ghz GA-MA790X-UD4P Sapphire HD 4830 Samsung 2 x 4GB 
Hard DriveHard DriveOptical DriveCooling
SanDisk SSD Samsung F3 Sony DVD Burner S1283/Panaflo M1 
OSMonitorPowerCase
Windows 7 22" AOC 1920x1080 Corsair CX400 Antec 300 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › help an undervolting noob