Case fans stopped spinning... AGAIN

[Vryonix]

I dont know whats going on, one day my fans have stopped spinning, then after a couple hours they start again. And now, they've stopped spinning, dont know if they will start again like last time or anything.

This PC is only like 4 months old aswell

[C2Dan88]

What is your motherboard? Have you altered the fan profiles in BIOS or Windows using third part y software

[Vryonix]

引用自 C2Dan88：

What is your motherboard? Have you altered the fan profiles in BIOS or Windows using third part y software

B450M pro4. I haven't checked the BIOS yet but I assume fans wont show up like last time

[[☥] - CJ -]

Which fans?
Case fans, CPU fan, GPU fans, what?

[unca.alby]

Two stupid questions, but they gotta be asked:

1) You're sure the temperature of the machine warrants a spinning fan? Many systems have fans that know to come on when the machine gets hot, and turn off otherwise. And if the machine's heat warrants a spinning fan, you'd better do something about it, because your machine can easily cook itself.

You can install software that will tell you the current system temperature minute by minute. Make sure it doesn't overheat.

2) You're sure there is nothing getting in the way of the fan blades? They spin freely without hitting anything, and there's nothing nearby that might somehow get in the way, sometimes?

Yes, check the BIOS. Nowadays, there's usually a configuration for case fans, cpu fans, hard drive fans, etc., and you usually can tweak things on the BIOS screen. See if there is a profile that indicates the temperatures to monitor, and whether the fans are on/off or proportional. (proportional is better, they can run at 10% speed, 50% speed, etc., as needed)

[chiefputsilao✖️ping]

if the case fans are set to 100% activity at all times and they stop suddenly, then perhaps they are dying.

[Supafly]

Which fans specifically? GPU, CPU or Case or a combination of them?

GPU fans don't spin until it reaches a certain temp.

CPU fan should be spinning at all times. Low rpm on idle or low demand processes then increasing as it heats up.

Case fans can be linked to change rpm along with the CPU so they'd be on at all times at different RPM. They can also be configured independently using different fan curves including not spinning until CPU/motherboard reaches a certain temp. Though I've never known anyone to configure them this way. Case fans can also be controlled by the case/fan controller if there is one.

[Spec_Ops_Ape]

引用自 Suicidal Monkey：

Case fans can be linked to change rpm along with the CPU so they'd be on at all times at different RPM. They can also be configured independently using different fan curves including not spinning until CPU/motherboard reaches a certain temp. Though I've never known anyone to configure them this way. Case fans can also be controlled by the case/fan controller if there is one.

4 out my 5 radiator fans are set to 0rpm at 40°C or less on the CPU.

[Supafly]

引用自 Spec_Ops_Ape：

4 out my 5 radiator fans are set to 0rpm at 40°C or less on the CPU.

You're the first I've known to actually do it then. Considered it myself but as my fans case/radiator barely make any noise until 65+ i was happy to leave them at low rpm. By low I mean 25% until 45°C

[Vryonix]

引用自 unca.alby：

Two stupid questions, but they gotta be asked:

1) You're sure the temperature of the machine warrants a spinning fan? Many systems have fans that know to come on when the machine gets hot, and turn off otherwise. And if the machine's heat warrants a spinning fan, you'd better do something about it, because your machine can easily cook itself.

You can install software that will tell you the current system temperature minute by minute. Make sure it doesn't overheat.

2) You're sure there is nothing getting in the way of the fan blades? They spin freely without hitting anything, and there's nothing nearby that might somehow get in the way, sometimes?

Yes, check the BIOS. Nowadays, there's usually a configuration for case fans, cpu fans, hard drive fans, etc., and you usually can tweak things on the BIOS screen. See if there is a profile that indicates the temperatures to monitor, and whether the fans are on/off or proportional. (proportional is better, they can run at 10% speed, 50% speed, etc., as needed)

I checked bios and only CHA1 saying N/A under it appears and changing settings isn't making a difference

[tacoshy]

引用自 Suicidal Monkey：

引用自 Spec_Ops_Ape：

4 out my 5 radiator fans are set to 0rpm at 40°C or less on the CPU.

You're the first I've known to actually do it then. Considered it myself but as my fans case/radiator barely make any noise until 65+ i was happy to leave them at low rpm. By low I mean 25% until 45°C

yes besides no smart eprson would put the fan speed dependign on CPu temperatures with LC. They always would set them depending on Liquid temperature and set the pump speed depnding on CPU temp.
And yes, setting fans on low RPM (300-400RPM for me) is still dead silent.

[Spec_Ops_Ape]

引用自 tacoshy：

引用自 Suicidal Monkey：

You're the first I've known to actually do it then. Considered it myself but as my fans case/radiator barely make any noise until 65+ i was happy to leave them at low rpm. By low I mean 25% until 45°C

yes besides no smart eprson would put the fan speed dependign on CPu temperatures with LC. They always would set them depending on Liquid temperature and set the pump speed depnding on CPU temp.
And yes, setting fans on low RPM (300-400RPM for me) is still dead silent.

I did have a 10k thermal probe (in a g1/4 cap) but it died after awhile so back to CPU temps, never bothered to replace it considering max CPU temp is early 60°C 100% load all core (handbrake, stress test).

[tacoshy]

引用自 Spec_Ops_Ape：

引用自 tacoshy：

yes besides no smart eprson would put the fan speed dependign on CPu temperatures with LC. They always would set them depending on Liquid temperature and set the pump speed depnding on CPU temp.
And yes, setting fans on low RPM (300-400RPM for me) is still dead silent.

I did have a 10k thermal probe (in a g1/4 cap) but it died after awhile so back to CPU temps, never bothered to replace it considering max CPU temp is early 60°C 100% load all core (handbrake, stress test).

still liquid temperature is mroe important then CPU temperature when LC. CPU is fine to 100C and will throttle to prevent damage. but LC over 45C can cause serios damage while nothing will save it from overheating and possibly damaging the pump and tubing and fittings.

[Spec_Ops_Ape]

引用自 tacoshy：

引用自 Spec_Ops_Ape：

I did have a 10k thermal probe (in a g1/4 cap) but it died after awhile so back to CPU temps, never bothered to replace it considering max CPU temp is early 60°C 100% load all core (handbrake, stress test).

still liquid temperature is mroe important then CPU temperature when LC. CPU is fine to 100C and will throttle to prevent damage. but LC over 45C can cause serios damage while nothing will save it from overheating and possibly damaging the pump and tubing and fittings.

Yep, nothing new there and we know that fluid temp is much lower than reported CPU temps. With 600mm radiator space and 5 Corsair ML120 fans running at 1200rpm max, I'm confidant that my loop won't be overheating nor has it over the last 12mths.

[UTFapolloMarine]

sounds like you may have a dying psu, and its allowing the mobo to let the fans not spin to keep the whole system from dying, i would try a new psu and be sure your not over heating and that your CPU is not overheating or throttled down

[tacoshy]

引用自 POUusnavy：

sounds like you may have a dying psu, and its allowing the mobo to let the fans not spin to keep the whole system from dying, i would try a new psu and be sure your not over heating and that your CPU is not overheating or throttled down

another uneducated guess from you. PSu has nothign to do with it unless you connect the fans directly to the PSU via SATA/Molex. Otherwise the fans are connected to the 12v line of the motherboard which power it gets from the 24pin ATX. if the PSU would be faulty then also his GPU wouldnt work.