[SOLVED] Hot place that i cant find

[rllb4]

I have a Gigabyte Z97X Gaming 3 motherboard and after running my CPU at 100% load for some time apparently the 4th temperature sensor gets to ~85 celsius (HWInfo only says "Temperature 4" as the name). The problem is, i cant find the hot spot on the motherboard. Any ideas?

 

[drea.drechsler]

I have a Gigabyte Z97X Gaming 3 motherboard and after running my CPU at 100% load for some time apparently the 4th temperature sensor gets to ~85 celsius (HWInfo only says "Temperature 4" as the name). The problem is, i cant find the hot spot on the motherboard. Any ideas?

If the temperature is fairly steady and unvarying with system load, reading that even right after boot-up, it's most likely just an unused temp sensor input on the super-IO chip. They can do anything from reading random values to what you're experiencing.

 

[rllb4]

If the temperature is fairly steady and unvarying with system load, reading that even right after boot-up, it's most likely just an unused temp sensor input on the super-IO chip. They can do anything from reading random values to what you're experiencing.

Thank you but it seems that's not the case, because when I turn the pc on it reads around 30 celsius

 

[drea.drechsler]

Thank you but it seems that's not the case, because when I turn the pc on it reads around 30 celsius

Does it hold that steadily, and then rise only as the CPU is working a heavy processing task? With a temp like that and varying with CPU processing load I'd consider it to be VRM temperature from a temp sensor somewhere between mosfets. You should have at least one CPU sensor already identified but it should track with the other even if a different value if at a different location.

While it could be a PCH temperature they normally vary with HDD activity and that's pretty high for that.

 

[Nemesia]

TMPIN0 - Motherboard (no idea where that sensor is)
TMPIN1 - PCH
TMPIN2 - CPU Socket
TMPIN3 - PCI-E
TMPIN4 - VRM (keep this under 125°C. Mine usually maxes out at 72 :/)
TMPIN5 - Aux (vSOC MOSFET)

Saw this on a reddit post for your board. It's VRM. Do not worry too much if you see 85C on that for your board.

 

[rllb4]

Thank you to both of you! Sadly my fans spin to max rpms after it exceeds 70c, which never happened before. I think ill check voltage settings and stuff.

 

[Nemesia]

Thank you to both of you! Sadly my fans spin to max rpms after it exceeds 70c, which never happened before. I think ill check voltage settings and stuff.

You never talked about any fans being to max rpms. If you have the case fans linked to your VRM's temperature you can change that in the BIOS. Should be CPU instead of VRM's.

 

[rllb4]

You never talked about any fans being to max rpms. If you have the case fans linked to your VRM's temperature you can change that in the BIOS. Should be CPU instead of VRM's.

Sadly i dont think i can change that. My fans go full speed as soon as any temperature sensor on the motherboard reaches 70c. But thank you!

 

[drea.drechsler]

Sadly i dont think i can change that. My fans go full speed as soon as any temperature sensor on the motherboard reaches 70c. But thank you!

What is happening when your VRM temperature is reaching 70C?

 

[rllb4]

What is happening when your VRM temperature is reaching 70C?

I dont notice anything happen besides the fans ofcourse. If you meant how i reach that temperature, then the answer would be by keeping my cpu at 100% load for a few days.

 

[drea.drechsler]

I dont notice anything happen besides the fans ofcourse. If you meant how i reach that temperature, then the answer would be by keeping my cpu at 100% load for a few days.

I mean, are you running any apps at the time. The VRM really should not be getting hot unless the CPU is working really hard, and that means an app has to be running.

 

[rllb4]

I mean, are you running any apps at the time. The VRM really should not be getting hot unless the CPU is working really hard, and that means an app has to be running.

Yes, i process workunits for Rosetta@Home, so my load is at 100%. I guess thats why. From now on ill shutdown my pc once in a while to give it some rest.

 

[drea.drechsler]

Yes, i process workunits for Rosetta@Home, so my load is at 100%. I guess thats why. From now on ill shutdown my pc once in a while to give it some rest.

You are right, that's going to make it run hot! But VRM's aren't like CPU's. The devices in VRM's that run that hot...MOSFETs...are extremely robust by comparison. They are routinely rated to operate at 125C, for instance.

But if you have a CPU cooler that does not direct cooling air onto the heatsink on them you could locate a small fan, maybe 50mm, blowing onto the heatsink to move the hot air out and let the case fans exhaust it. This is not an uncommon thing to do when processing extended duration AVX heavy loads like Rosetta or Folding@Home.

 

[Nemesia]

I saw motherboard run VRM's at 90C+ for years. You're fine. Unless you're starting to get problems.