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by rasz 82 days ago
>how LLMs failed me

I assumed LLM gave you or validate the idea one of the biggest mobo manufacturers on the planet didnt wire temp/fan control on their flagship Gaming board?

>not sure how you found that model number

manufacturer diagram of MSI MS-7693 rev 2.0 (970 Gaming) https://www.elvikom.pl/viewtopic.php?lang=en&t=54275&p=21060...

> it's literally an F71878AD

rev 2 specifies F71889AD but Im pretty sure all Fintek F71868/869/870/878/882/889 are more or less compatible https://docs.kernel.org/hwmon/f71882fg.html https://www.linuxquestions.org/questions/linux-hardware-18/f...

rev 4.0 and up do list F71878AD https://www.scribd.com/document/961738196/MS-7693-Rev4-2 https://html.scribdassets.com/5xds0sz8hsgb4iux/images/27-e6d... diagram has all the fans and temp stuff wired up.

Only one pin comes to mind that would break all temp sensors, fans and Voltage monitoring but not ps2/serial/lpt, that pin is 88 analog ground.

>HWiNFO screenshot of it not reading anything

HWiNFO has this "feature" that makes it hide sensors reporting maximum/minimum possible values. HWiNFO considers such readings sign of a missing/broken sensor. Broken analog ground pin on your motherboard would make all those sensors return bad value.

Video of someone running hwinfo successfully on 970 gaming rev 4.x (F71878AD) https://www.youtube.com/watch?v=Wq50OuGC1ys

1 comments

I see, I see. That's an impressive amount of digging you did. Thanks for that. Think I could wire pin 88 to ground and basically fix it?

Even if I do get it fully fixed, I think my project could be useful for motherboards that have thermal probes but no PWM.

Real talk though, I'd love to see this MSI board fully operational.

> Think I could wire pin 88 to ground and basically fix it?

I think you could check if the pin is reliably connected to ground.

Did you buy this board already broken? Its also possible someone connecting Fans shorted 12V to Fintek FAN tacho input (two middle pins on 4 pin connector) frying all ADC inputs, in that case only replacement chip would work.

>Did you buy this board already broken?

Honestly I have no idea what this board has been through before getting to me. It had the PWM/Temp/RPM issue from the moment I got it. Maybe someone did break the chip. I'm gonna look up that diagram and try to see if the pin is connected to ground