View Full Version : G75 CPU Fan Problem

03-10-2013, 02:10 AM
hi guys, I have recently noticed that my G75 is keeping the CPU fan at the minimum, even when I ran Prime95. I managed to notice that it is something with the Power4Gear Hybrid or the Power options of Windows. I set all cooling settings to active, so this should make the fan kick in when under load but it sometimes does and other doesn't. I tried setting all again to default, re installed Power4Gear, but still the same thing.

Would really appreciate help.

03-10-2013, 03:20 AM
I would recommend you update your BIOS and see if the issue persists.

Bios file can be downloaded directly from the Asus website: http://www.asus.com/ROG/G75VW/#support_Download

03-10-2013, 05:42 AM
I have the latest one, v223.

03-10-2013, 01:13 PM
If your CPU fan was not working properly, I'd think running Prime95 would shut your system down in less than 5 minutes due to overheating. Is that what you observed? If not, what maximum CPU temperatures are achieved on your laptop when you run Prime95?

What fan speeds (in RPM) do you observe?

03-10-2013, 01:47 PM
The fan gets stuck at 2000/2100 RPM. I check with Everest while running Prime95 just to see if the FAN kicks in but when temps hit 80 and the fan still doesn't kick I stop all workers in Prime95 so as not to overheat the system. It appears to be something with the power management settings because sometimes I get it to work and others not.

03-10-2013, 03:41 PM
Have you tried entering the BIOS and restoring default settings? If so and the fan behavior persists, I'd be tempted to downgrade the BIOS version. If that fails, it could be a fan hardware problem.

03-10-2013, 04:55 PM
I have been testing it and these last days it has been working OK now. It seems that after several reboots, the active cooling settings in the power management did the trick. Now that we are talking about the BIOS, do you know how tweak those number in the Platform Thermal Configuration like the TC1, TC2 and all that... I want my fans to kick in 100% at quite low temps but did not manage to do it. Also don not know if those settings modify the behavior of the CPU fan or the GPU fan. (Strangely Everest or any other program do not detect the GPU fan).


03-10-2013, 05:25 PM
Sorry, I haven't heard of anyone having success in changing ASUS laptop fan thermal profiles.

03-11-2013, 03:23 AM
asus laptop can not control fan speed, it is auto detect.

03-11-2013, 03:57 AM
Not even if I change the thermal parameters in the BIOS ?

Back to the FAN Problem, I noticed that when I play games such as Crysis 3 the FAN kicks, its Prime95 that is driving it crazy and I don't know why it does not kick while in Prime95 load. Any suggestions ?