Computer freezes, reboots with CPU Fan Error

[Rhypht]

First, I want to say that I've seen many threads regarding this issue, none of which have addressed or corrected my problem exactly.

It is a brand new computer, I just built it. When playing some games, occasionally the computer will lock up completely (the first time it happened, it blue screened. Every time after that, the system just locks up until I hard reset). When I reboot it (manually), I get the "CPU Fan Speed Error" message, and then boot into BIOS.

My CPU fan is spinning around 430RPM, and my CPU temp is roughly 40°C. Rebooting into Windows from the BIOS works fine.

The fan is definitely running, and connected to the correct header. The CPU doesn't seem like it's overheating (40°C doesn't seem unreasonably hot to me). What else can I try?

The motherboard is an Asus Z170-A. The cooler is a Cryorig H7. It may be worth noting that it's not possible to adjust the CPU fan speed in the BIOS. There is an option to set it to different "profiles", none of which actually save when you exit BIOS.

 

[Y0GI]

First, I want to say that I've seen many threads regarding this issue, none of which have addressed or corrected my problem exactly.

It is a brand new computer, I just built it. When playing some games, occasionally the computer will lock up completely (the first time it happened, it blue screened. Every time after that, the system just locks up until I hard reset). When I reboot it (manually), I get the "CPU Fan Speed Error" message, and then boot into BIOS.

My CPU fan is spinning around 430RPM, and my CPU temp is roughly 40°C. Rebooting into Windows from the BIOS works fine.

The fan is definitely running, and connected to the correct header. The CPU doesn't seem like it's overheating (40°C doesn't seem unreasonably hot to me). What else can I try?

The motherboard is an Asus Z170-A. The cooler is a Cryorig H7. It may be worth noting that it's not possible to adjust the CPU fan speed in the BIOS. There is an option to set it to different "profiles", none of which actually save when you exit BIOS.

Asus mobos used to have a setting for "Min CPU Fan Speed" or something like that. Does your mobo not have this?

Yogi

 

[Rhypht]

Asus mobos used to have a setting for "Min CPU Fan Speed" or something like that. Does your mobo not have this?

Yogi

I have that set to "Ignore", because I was having issues where the computer would not boot due to the CPU fan running at different RPMs on startup.

 

[Y0GI]

Asus mobos used to have a setting for "Min CPU Fan Speed" or something like that. Does your mobo not have this?

Yogi

I have that set to "Ignore", because I was having issues where the computer would not boot due to the CPU fan running at different RPMs on startup.

40*C. is nothing. Computer should run for years at that temp.

So, you have 2 problems:
1) Lock ups, and
2) CPU fan speed error

What CPU do you have?
What PSU do you have?
What GPU do you have?
What RAM do you have? (Make, model#, size, # of DIMMS?)
Are CPU or GPU OC'ed?

As I recall, that low CPU fan speed comes on when the fan starts up at a speed below the setting in the BIOS. The solution is to set it in the BIOS to something lower, like 200 RPM.

Yogi

 

[Rhypht]

40*C. is nothing. Computer should run for years at that temp.

So, you have 2 problems:
1) Lock ups, and
2) CPU fan speed error

What CPU do you have?
What PSU do you have?
What GPU do you have?
What RAM do you have? (Make, model#, size, # of DIMMS?)
Are CPU or GPU OC'ed?

As I recall, that low CPU fan speed comes on when the fan starts up at a speed below the setting in the BIOS. The solution is to set it in the BIOS to something lower, like 200 RPM.

Yogi

CPU - Intel i7 6700K
PSU - EVGA G2 650W
GPU - EVGA GTX 980ti
RAM - Corsair Vengeance LPX 16GB (2x8) DDR4-2400, 288-pin DIMM

Nothing is overclocked.

I went into the actual QFan Configuration tool, not just the profiler, and set things manually there (including the monitor from 400RPM > IGNORE. I haven't had the issue again yet. Will the BIOS actually lock up my computer if it detects the CPU fan is running lower than it should?

 

[Y0GI]

40*C. is nothing. Computer should run for years at that temp.

So, you have 2 problems:
1) Lock ups, and
2) CPU fan speed error

What CPU do you have?
What PSU do you have?
What GPU do you have?
What RAM do you have? (Make, model#, size, # of DIMMS?)
Are CPU or GPU OC'ed?

As I recall, that low CPU fan speed comes on when the fan starts up at a speed below the setting in the BIOS. The solution is to set it in the BIOS to something lower, like 200 RPM.

Yogi

CPU - Intel i7 6700K
PSU - EVGA G2 650W
GPU - EVGA GTX 980ti
RAM - Corsair Vengeance LPX 16GB (2x8) DDR4-2400, 288-pin DIMM

Nothing is overclocked.

I went into the actual QFan Configuration tool, not just the profiler, and set things manually there (including the monitor from 400RPM > IGNORE. I haven't had the issue again yet. Will the BIOS actually lock up my computer if it detects the CPU fan is running lower than it should?

Thanks for the info.

The Min Fan Speed will not cause lock-ups but it will cause the boot error that you mentioned.

When and how are you measuring the 40*C. CPU Temp? Idle? Gaming? Stress testing?

Please check your CPU and GPU temps while using a demanding game (one that usually causes the lock-ups).

Try removing/reinserting the 24 pin ATX power plug to the mobo, the 8 pin CPU plug to the mobo and the power plugs to the GPU.

Are you using the latest (non-Beta) drivers for your GPU?

Have you updated all of your mobo drivers from Asus? The Z170 chipset is still quite new and drivers are updated frequently.

Last, but not least, are you using the latest Asus BIOS for your mobo? Only do this if all above fails.

Yogi