1stFalloutBoy
Junior Member level 1
I am in desperate need of help, I have an extremely expensive motherboard and CPU, I think there may be a fault in the systems bios that has not been fixed yet but I think it may have already killed an AMD Threadripper 2950X.
{Edited should have mentioned the Fan is four wire Noctua NF-A15PWM DC12V 0.13A}
Everything seemed fine after the replacement but then five weeks later it happened again, luckily I saw it and was sitting in front of the computer at the time.
The fan speeds have been set in bios with a minimum of 600 rpm so it should never just stop no matter what, I have had to remove the fan monitoring software from the desktop that came with the motherboard because it is definitely faulty and causes the computer to do a hard power down without warning. No this is not an emergency thermal shutdown as the CPU measured both by itself and through a probe were only 38.c
When it first died I noted that the fan had gone off and the CPU's heatsink was hot enough to fry an egg on.
I have seen an example circuit here https://www.instructables.com/id/Reading-DC-Fan-RPM-With-Arduino/ on how to read the fan speed but I would also like to determine if the signal saying stop is coming from the motherboard.
I understand digital logic but nothing about how this fan stuff works, what I need is something that takes the 4 pin input from the motherboard and feeds that as per normal to the fan but pinches the reading off of it to determine what the motherboard is telling the fan to do and if it is telling it to go to zero sound a permanent alarm, or if the fan itself stops regardless of the fact the motherboard is sending the correct values to sound a different permanent alarm.
I don't dare run this machine for to long without some sort of warning and it is scaring the carp out of me.
I have an Arduino which I can use for this too.
Hopefully someone can help.
{Edited should have mentioned the Fan is four wire Noctua NF-A15PWM DC12V 0.13A}
Everything seemed fine after the replacement but then five weeks later it happened again, luckily I saw it and was sitting in front of the computer at the time.
The fan speeds have been set in bios with a minimum of 600 rpm so it should never just stop no matter what, I have had to remove the fan monitoring software from the desktop that came with the motherboard because it is definitely faulty and causes the computer to do a hard power down without warning. No this is not an emergency thermal shutdown as the CPU measured both by itself and through a probe were only 38.c
When it first died I noted that the fan had gone off and the CPU's heatsink was hot enough to fry an egg on.
I have seen an example circuit here https://www.instructables.com/id/Reading-DC-Fan-RPM-With-Arduino/ on how to read the fan speed but I would also like to determine if the signal saying stop is coming from the motherboard.
I understand digital logic but nothing about how this fan stuff works, what I need is something that takes the 4 pin input from the motherboard and feeds that as per normal to the fan but pinches the reading off of it to determine what the motherboard is telling the fan to do and if it is telling it to go to zero sound a permanent alarm, or if the fan itself stops regardless of the fact the motherboard is sending the correct values to sound a different permanent alarm.
I don't dare run this machine for to long without some sort of warning and it is scaring the carp out of me.
I have an Arduino which I can use for this too.
Hopefully someone can help.
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