Proprietary nVidia driver pegs fan at 65%

Question

Window-shot:
http://i.imgur.com/feNCk2v.png
$ lspci | grep "VGA"
02:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 620] (rev a1)
$ pacman -Qi nvidia
Name : nvidia
Version : 325.15-5
Description : NVIDIA drivers for linux
Architecture : i686
URL : http://www.nvidia.com/
Licenses : custom
Groups : None
Provides : None
Depends On : linux>=3.10 linux<3.11 nvidia-libgl nvidia-utils=325.15
Optional Deps : None
Required By : None
Optional For : None
Conflicts With : nvidia-96xx nvidia-173xx
Replaces : None
Installed Size : 3731.00 KiB
Packager : Evangelos Foutras <[email protected]>
Build Date : Fri 30 Aug 2013 06:11:40 PM NDT
Install Date : Thu 05 Sep 2013 11:00:43 PM NDT
Install Reason : Explicitly installed
Install Script : Yes
Validated By : Signature
$ cat /etc/X11/xorg.conf
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen" 0 0
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
EndSection
Section "Screen"
Identifier "Default Screen"
Device "Device0"
Option "Coolbits" "4"
Option "DPMS" "false"
SubSection "Display"
Modes "nvidia-auto-select"
EndSubSection
EndSection
Everything works well, even native Steam and games.  However my GPU fan is constantly pegged at 65%.  I'd like this to be lower.  The speed is "variable" and I believe that is what I want - automatically adjust to temperature.  However, I'd like the fan speed to be lower and automatically adjust to temperature.  I'm new to the proprietary nVidia driver so please bear with me and hopefully it is just something simple I've missed.

Answer 1

Awesome that's got it working.  Now for another question:  How do I get it the module to load automatically like the stock kernel does?
The normal "modprobe nvidia" reports module not found so I'm having to do "insmod /usr/lib/modules/extramodules-4.0-ARCH/nvidia.ko.gz" (at first that gave a bunch of undefined symbol errors but that was resolved by manually doing a "modprobe drm")
So how does modprobe whatever autoloads the modules at boot know where to look?  I already symlinked /usr/lib/modules/extramodules-4.0-ARCH to /usr/lib/modules/4.0.0-rc1-ARCH/extramodules like the stock kernel does but I guess that's not enough.