SPCR

With my new P9X79 Pro motherboard I'm having a strange problem with fan speed. First of all, if I set the fans to quiet or anything in the bios they won't go below 60%, which is too loud.

So in windows using AIsuite I've set the fans to lower speeds, the rear 92mm's on 45%, and the two 120mm's on my H100 to 41% and 42% - these are the fans that came with the H100 and to get them to run at the same rpm I have to have one of them 1% higher than the other.

This works fine, keeps the 92mm's at 1000rpm and the 120mm's at 900rpm, and while the system probably isn't as quiet as some others on here, I'm happy with it.

What is truely annoying is that it does not remember these settings after a reboot. I've attached a screen shot of what it looks like. Ignore the ramp in the background running from 60% up to 30C and then up to 100% at 75C, that is the quiet profile that I applied to get 'chassis fan 4' to jump up to 60%. On boot, the orange circle sits at 60% and completely ignores the user setting. I need to click on Apply on each fan header I want to change, then the fan speed drops. As you can well imagine, nearly 1600rpm on a 120mm fan is barely tolerable!

I've searched around on here for Asus aisuite, with various 60%, user and silent tags as well and haven't found anyone having the same problem as me. I've found people that have been unable to go below 60% at all, but not exactly the same problem. I sadly don't have any 4 pin pwm fans at all to test with, otherwise I would try one of those to see if it fixes it.

Could someone please try this for me and see if a 3 pin fan 'forgets' going below 60%, and then if a 4 pin pwm fan can remember going below 60%? Thanks in advance!

I would also try different versions of the Asus AI Suite / Fan Xpert, some users have reported not able to go below 60% while others have no problems, i saw a case, dont have the link though, that he tried an older version and he manage to pull the 3pin (not 4pin) below 60%. Another thing you could check, in some cases, the CPU mobo headers have less restriction than the case fans, i believe its 30% for the cpu heathers, but not sure on X79 mobo.

Good idea, I'm downloading 2.16, I installed 2.11 from the CD.

The cpu fan header lets me go lower as well, down to 20%, but it has the same bug, it forgets to set below 60% when the PC is rebooted.

I'll get back to you once I've installed 2.16

My Gigabyte mainboard is also bad regaring fan control. I solved it by adding a silent adapter, so even when the board wants 100%, it gets 7V or whatever. Use with caution of course.

hah sweet, 2.16 fixed it! Using the exact same settings as before, the fan speed stays at about 60% of so from pressing the power button to getting into windows, then goes to the lower speeds as soon as the program starts running.

It is available on the P9X79 Pro download page under utilities, I'm unsure if it will work for all Asus boards or not, I only went to my motherboard first because it is a very new board and I figured the newest version would most likely be on there.

Tetreb - my other case fans, the two 120mm's down by the hard drives are already running at 7v, which are the loudest in the system. As per the original article on SPCR, they are about 24dba at 7v. http://www.silentpcreview.com/article602-page6.html

I meant that a fan controller would still let the original fan speed curve work, but shifted down. That way maybe even the factory setting could be silent. My board jumps to 100% speed at 65°C regardless what I set it to. Now with a silent adapter it runs 100% at 700RPM.

With my ASUS M4A88TD-m EVO I don't use a 2.xx version but a 1.xx version of AI Suite. Have never experiences any issues with forgotton fan profiles. Same functionality