Asrock z170 extreme 4 burning smell help

[klaudmjj]

I have my cpu running at 4.9ghz @ 1.25v. My cpu at idle is around 38c on be quiet pure rock air cooler.
I started to smell a burning smell so i opened the case and I smelt the power delivery while the pc was on, and it smelt like burning plastic, I touched the heatsink for the power delivery and it was hot, just like a hot bath would be (maybe lower) my software says the motherboard is on 30c but I dont believe that.
What are safe temps for a motherboard?
Naturally I turned my overclock to stock and the motherboard was a lot cooler. Luke warm. Am I okay with having my overclock? I really doubt that 1.25v would damage anything. Im a bit scared as this is my first gaming pc I've built.
Here is an older picture when I didn't have my graphics card yet, now I have a gtx 1050 ti.
https://gyazo.com/082c6f70446377ffd94f59bbc7c60d04 (can't take an updated picture as phone is broken)

 

[boju]

Your cpu fan power wire, looks like its touching the heatsink, investigate clearance and use cable tie to hold it away. Check for melting marks.

 

[boju]

Oh no thats the cpu power cable i think, the one that runs at top of heatsink. Hard to see if its touching.

 

[klaudmjj]

Your cpu fan power wire, looks like its touching the heatsink, investigate clearance and use cable tie to hold it away. Check for melting marks.

No melting marks, the heatsink above the cpu cooler is cold to touch, its only the one with the z170 writing on it that gets super hot.

 

[boju]

https://www.hwinfo.com/

Click sensors tab for temps, hwinfo is pretty accurate, we'll see second opinion on temps if you're concerned the bios isn't displaying correctly

 

[klaudmjj]

hwinfo is showing 36c on the PCH temperature under the motherboard tab

 

[boju]

Temp seems fine. From about 42c the heat starts to hurt by touching.

Hard to say where the plastic smell is coming from. Try get close and see where smell is strongest if you can. Check the psu as well.

 

[klaudmjj]

Temp seems fine. From about 42c the heat starts to hurt by touching.

Hard to say where the plastic smell is coming from. Try get close and see where smell is strongest if you can. Check the psu as well.

Smell is coming mostly from the left power delivery heatsink. Psu doesn't smell, I have a evga supernova g2.

 

[boju]

Roll up a piece of paper and use that to try pin point where the smell is coming from. Fumes will be toxic so dont smell it too much.