Quite efficient and very quiet
I use it on a Core Ultra 265K. It's true that you can't hear it, it idles very slowly. When I run compilations, the fan slowly increases in power but the air that comes out remains cold. I should even be able to slow down the fan during these occasional phases (unfortunately, the MSI Z890 motherboard doesn't give me access to the PWM settings).
The only downside (hence the missing star) is that the metal spacers to be screwed onto the motherboard tracks, so I had to add cardboard washers to protect them. I don't know if it's the motherboard that doesn't respect the spec or the fan mounting, but be careful before you screw! What's more, the assembly instructions are rudimentary and approximate, to say the least, so when you see this you have your doubts.
Ah, surprise, there's a long Phillips screwdriver under the foam at the bottom of the box, which you discover once you've assembled everything and are about to take the remains to the bin :-)
