push/pull fan settings

Raziel1 · 11 Apr 2009 at 05:08

I've just finsihed running a stability test on my rig (8 hours of prime) & everything was fine.

But one thing I have noticed from hardware monitor is the fans on my True are running at different speeds. Both fans are Noctua NF-P12 fans.

The pull fan is plugged into the CPU fan header

The push fan is plugged in to the CHA_FAN1 header.

with prime running I'm showing the max RPM of the push fan to be 32 rpms lower than the pull fan.

is this a problem or am I just being overly picky? :confused:

Zefan · 11 Apr 2009 at 05:13

They should be running at 800+ rpm anyway so it's a relatively small difference.

JonJ678 · 11 Apr 2009 at 07:39

Plug both into the cpu fan header with a Y shapped splitter.

A more general answer to push/pull settings would be push through air coolers, pull through radiators

Push/pull combined on a true got me two degrees better than one on push

Raziel1 · 11 Apr 2009 at 08:01

I didn't want to use a Y splitter, didn't want to risk damaging the MB.

thanks for the help gents, I'll not worry about it.

Pneumonic · 11 Apr 2009 at 10:05

you wont damage the motherboard running two fans off one header... well those two fans anyways!

in terms of RPM difference this is normal