I doubt that your heatsink can stop working, it's just a metal after all. Just need to replace attached fan. Mildly overclocked Northwood does not require supercooler to function properly anyway.

The Serpent Rider wrote on 2023-06-15, 19:05:

I doubt that your heatsink can stop working, it's just metal. Probably could just replace a fan.

You are right, the problem is obviously the fan, sorry for my broken english.
It can't be changed.
I also noticed that the voltage between the gnd and 12v is 10.99 could it be the issue?
I just checked I could change the fan but it's a 7x7, I was thinking if it was possible to use an heatsink with bigger and less noisy fan.
I've checked on my stash and I found a 7x7 fan which goes up to 4500rpm (noisy as hell). Otherwise I've found a GELID Solutions Silent 7 (https://gelidsolutions.com/product/case-fan-silent-7/) which is rated for 2200rpm, would it be good?

You can buy standard mounting with metal bracket (for example: https://www.ebay.com/itm/334263432012) to avoid PCB bending and some late Intel box cooler with copper core (there are plenty around there).

Or yes, replace bad fan with the one you linked.

The Serpent Rider wrote on 2023-06-15, 19:23:

You can buy standard mounting with metal bracket (for example: https://www.ebay.com/itm/334263432012) to avoid PCB bending and some late Intel box cooler with copper core (there are plenty around there).

Or yes, replace bad fan with the one you linked.

I already have this bracket. I tried the only other 7x7 fan I have but unlucky screws aren't long enough (the plastic tab is probably higher than the coolermaster).
I've also tried to find a fan adapter (120 to 70) but the price is crazy, like 20 eur.

Hello,
If you want a "direct" 120x70 that will be hard ... except of generic adapter like this : https://www.amazon.com/InLine-36011-accessoir … t/dp/B000TFXKDK

I already made something like that but finally, it's less efficient to have a 120x70 instead of a 80x70 because of too much airflow "distortion" with a 120 to 70.
Again, prefere a good 80mm fan (like Panaflow, Sunon, Sanyo Denki or Noctua) to 70 with an adapter : the air flow will be more direct to the heatsink and you will able to keep a good level of silence.

80386SX wrote on 2023-06-16, 12:01:

Hello, If you want a "direct" 120x70 that will be hard ... except of generic adapter like this : https://www.amazon.com/InLine-3 […]
Show full quote

Hello,
If you want a "direct" 120x70 that will be hard ... except of generic adapter like this : https://www.amazon.com/InLine-36011-accessoir … t/dp/B000TFXKDK

I already made something like that but finally, it's less efficient to have a 120x70 instead of a 80x70 because of too much airflow "distortion" with a 120 to 70.
Again, prefere a good 80mm fan (like Panaflow, Sunon, Sanyo Denki or Noctua) to 70 with an adapter : the air flow will be more direct to the heatsink and you will able to keep a good level of silence.

you are right, the main problem is that apparently there aren't any 80 to 70 adapter available, at least I couldn't find them in Europe, probably a 3d printed one is needed?

If 3D printing is involved, you might as well adapt AMD cooler mounting for Socket AM3+, which is already used as universal solution to mount coolers on LGA775/1366/1156 and others. That way you can mount a lot of good modern coolers.

The Serpent Rider wrote on 2023-06-16, 19:18:

If 3D printing is involved, you might as well adapt AMD cooler mounting for Socket AM3+, which is already used as universal solution to mount coolers on LGA775/1366/1156 and others. That way you can mount a lot of good coolers.

Not really involved since I do not have a 3d printer nor the model, it was an idea if there is no other solution available :\