4pin and 3pin fan headers......

anerky99 · Rated XXX Joined: 06 Apr 2009 Posts: 219 Location: UK

Right, looking at new mobos, specifically the Gigabyte UD4P, alot of the new x58 boards dont seem to have the 4 pin dfan headers. they only have 3pin headers. Does this mean that all of the fans installed will only run at full speed?? I dont really understand why 4pin headers arent set in?? Wont it mean that 4pin fans with PWN wont work to their full capacity on the 3pin headers. I odnt understand because the boards ive looked at are all very new boards :s.
Anyome got any information??

**Doctor Feelgood** · Posted: Wed, 08 Apr 2009 06:59:09 Post Subject:

You can still possibility have fan control. Most of the boards I have had lately use the one 4-pin PWM connection for the CPU, but the balance of 3-pin connections can be controlled manually in the BIOS, or with temperature set points.

x.clay · Posted: Thu, 09 Apr 2009 12:59:29 Post Subject:

I have a UD3P board and it only has a 4-pin connection for the CPU and one other fan (I believe). I ran a couple of fans off my motherboard for a while and it did not run the fans a full speed. I couldn't figure out how to adjust fan speeds for case fans through the bios but I didn't really try that hard. Currently run all my fans through a fan controller.

Crisis · Rated NC-17 Joined: 09 Feb 2007 Posts: 182

Your motherboard won't be able to control fans via the PWM feature, but it might still be able to control fans by voltage, nevertheless. I have a Gigabyte 780G, though it comes with 4 pin headers, it easily controls the fan speed of 3 pin fans.

anerky99 · Rated XXX Joined: 06 Apr 2009 Posts: 219 Location: UK

Meh, if i cant control them ill have to cope lol, hopefully getting a case with built in potentiomtors for the 2 big fans on it so hopefully jsut be a single exhaust and cpu fan i wont be able to control.