News Noctua's Colossal NH-P1 Passive Heatsink Arrives For $100

The 3950X has a TDP of 105W, but a PPT of 142W. In normal use, it can and will boost itself up against that 142W limit as long as it isn't throttled by CPU or VRM temps. Most other 8+ core Ryzen CPUs have the same 142W PPT (3700X, 5800X, 5950X, etc).

Given my experiences with a 3950X and 5950X under Noctua's NH-U12P and NH-D14, I suspect that this passive cooler will still cause the CPU to throttle down under extended loads, but is still a very good option and I'm glad they were finally able to get at least one of them seemingly all the way to retail. 😉
 
To each their own but I don’t get the need for something like this unless you want to go fanless for the sake of being fanless. The fans on some of the bigger existing heatsinks can be inaudible outside the case and don’t require the weight or bulk that this one brings. But hey, pc builds aren’t always about being practical so I’m sure there’s a market for this monster fanless cooler.
 
To each their own but I don’t get the need for something like this unless you want to go fanless for the sake of being fanless.

The need for this is to have a 0db PC with good performance . also to have a super clean PC without Dust . and finally , they work wonders with water proof PC cases and industrial PCs.
 
The need for this is to have a 0db PC with good performance . also to have a super clean PC without Dust . and finally , they work wonders with water proof PC cases and industrial PCs.
I think you are kidding yourself if you think using a fanless CPU cooler like this, will result in a super clean PC, i.e. no dust. In a closed case, you will need fan to draw air in, and exhaust the hot air out of your PC. While you don't need a fan on this cooler, it doesn't mean no airflow is required. This is not a cooler where its utilising the sides and top of the casing as heatsink, so you will surely need some fans to move air within an enclosed case, especially when its running a high end CPU. You can mount this on a open bench, but again, does not solve the problem of dust.

I also question the need for 0db PCs. PCs with good fans running at low RPM are almost inaudible and can achieve better cooling performance. Unless you are sticking your ear to the side of your PC case all the time, or have the hearing power of Superman, I don't think you can discern whether there's a fan running at low RPM vs a 0db cooler.
 
I think you are kidding yourself if you think using a fanless CPU cooler like this, will result in a super clean PC, i.e. no dust. In a closed case, you will need fan to draw air in, and exhaust the hot air out of your PC. While you don't need a fan on this cooler, it doesn't mean no airflow is required. This is not a cooler where its utilising the sides and top of the casing as heatsink, so you will surely need some fans to move air within an enclosed case, especially when its running a high end CPU. You can mount this on a open bench, but again, does not solve the problem of dust.

I also question the need for 0db PCs. PCs with good fans running at low RPM are almost inaudible and can achieve better cooling performance. Unless you are sticking your ear to the side of your PC case all the time, or have the hearing power of Superman, I don't think you can discern whether there's a fan running at low RPM vs a 0db cooler.

I know what I am talking about. and This heatsink is perfect with <=45 watt TDP CPU without fans. I never said anything about high end CPU. Intel has the "T" Class CPUs for each model. rated between 35 and 45 watts even the i9 , like the i9 10900T and i9 11900T
 
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But the amount of air is definitely lower for heatsinks with large area than for the small ones with a fan. Less airflow also means less dust. Even a big heatsink without some airflow is not effective. So, to get the desired cooling effect (at 0dB), a case need to be constructed as semi-open, and the heatsink has to be oriented (with regard to ground level) such that it blocks the airflow the least of the possible orientations.

Surface area is the king. Airflow is the queen. Without the latter, any heatsink is only a passive heat absorber. We knew this when we designed CooliPi 4B passive heatsink for Raspberry Pi 4. Mind you, this board has some 7-11W TDP, and with CooliPi , if can rest circa 25˚C above the ambient temp at max load.

Go extrapolate this to a CPU of your choice. If you close it in any case, be sure it can get the cold air from below and can exhaust it to the top. Proper heatsink fins/ribs alignment is then a necessity.

I can also confirm that running an NH-D15 with slow fans is almost inaudible. The most audible source of sound are HDDs. If you plan to use an HDD, don't waste your money on fanless CPU heatsink.
 
To each their own but I don’t get the need for something like this unless you want to go fanless for the sake of being fanless. The fans on some of the bigger existing heatsinks can be inaudible outside the case and don’t require the weight or bulk that this one brings. But hey, pc builds aren’t always about being practical so I’m sure there’s a market for this monster fanless cooler.
building a server in an area where accessing it frequently and dusting aren't an option, builds for use cases where vibrations and audible fans aren't ideal. There are tons of use cases.
 
I know what I am talking about. and This heatsink is perfect with <=45 watt TDP CPU without fans. I never said anything about high end CPU. Intel has the "T" Class CPUs for each model. rated between 35 and 45 watts even the i9 , like the i9 10900T and i9 11900T
If you place this in a sealed case as you suggested, the cooling power is limited to the heat dissipation of the case - which will be very disappointing. Sealed industrial PCs use the case as a heat sink, which this cooler does not.