sysfan does not auto spin when turning pc on

[luv2liv]

i have a 120mm fan with 3 prongs plugged into the sysfan1 of the MSI motherboard.
it does not automatically spin whenever the pc is turned on. i would have to stick my fingers in and manually give it a whirl.

right now it's working as seen above based on the MSI "Command Center" program. what could be the problem?
i only noticed the problem with cooling because the hard drives were at 55C according to Crystal Disk.

 

[UsandThem]

Sometimes if the fan RPM is too low, it doesn't get enough power to start spinning. Each fan has a different minimum RPM required to actually start up.

If you turn the setting to 'full speed' or 100% in your BIOS, does it start up? If not the fan or connection on the motherboard can be going bad. Also try it on a different fan connection on your board (if you have one).

 

[luv2liv]

ok. i will have to play around with bios settings then. i thought these things are automatic. thank goodness the cpu fan auto start by itself!

 

[UsandThem]

ok. i will have to play around with bios settings then. i thought these things are automatic. thank goodness the cpu fan auto start by itself!

With a CPU fan, if it doesn't run your system would either immediately warn you or power off to prevent damage. With case fans, they aren't viewed as vital as the CPU fan.

If you look up the model of the fan you have, the manufacturer will list it's minimum RPM under the detailed specs of their website. Generally, I run my fans around 700 RPM to start, and there is no issue with them starting. I've never really messed around to run them lower as at this RPM they are dead silent.

You can adjust your fan curve to begin a 60% in the pic you attached, and that should plenty of juice to get them moving on their own automatically.

 

[Paperdoc]

I have a different idea. Most mobos, especially on SYS_FAN headers controlling 3-pin fans, will start up with full voltage to the fan to guarantee that it starts. A second or two later, as the rest of the BIOS checks complete, it will reduce the fan speed according to the temperature sensor on the mobo. Thus, it is unlikely that your mobo is failing to give that fan sufficient voltage to start up.

What you describe is a fan which fails to start, but will start if pushed by a finger and then keep going for a while. That symptom is typical of an older fan with worn bearings causing excessive load on the motor. Such a fan is destined to get worse. It cannot start itself, and it will stall even when running, more often as time goes on. You need to replace it before your case cooling fails completely.

 

[luv2liv]

i agree.
now i monitor the temp once awhile with http://openhardwaremonitor.org/
strangely it doesnt have an audio alarm with temps hit a certain level. what monitor are you using with alarms?
i heard http://www.alcpu.com/CoreTemp/ is good but not accurate from some reviews..

 

[UsandThem]

i agree.
now i monitor the temp once awhile with http://openhardwaremonitor.org/
strangely it doesnt have an audio alarm with temps hit a certain level. what monitor are you using with alarms?
i heard http://www.alcpu.com/CoreTemp/ is good but not accurate from some reviews..

You can set temp alarms in your BIOS.

Anyways, so did increasing your fan % fix your issue, or is your fan dying?

 

[VirtualLarry]

I had a brand-new build once, with a thermaltake case I think I might have picked up from MC. ("V3"?)

It came with a top rear exhaust fan, that had a three-pin connection. I plugged it into the mobo (some budget S775 board, I think.)

When I booted the system, it was sort of 50/50 whether the fan would spin up successfully or not. Otherwise, I had to take side off, and use my hand to start it spinning.