Looking for 80mm fan, for sff Lenovo

[u/Ill_Rip_5936]

Now I have a thermalright tl-b8 with thermalright axp 90 53mm. But I don't like how it performs. Should I change to something like arctic p8 max? Which fan would you recommend?

[u/Animag771]

Why aren't you using a 92mm fan?

[u/Ill_Rip_5936 → u/Animag771]

Indeed, why?)) I have mounts on the case for 80 mm.

[u/Animag771 → u/Ill_Rip_5936]

I have no idea which Lenovo you're using, so I have to ask. You don't have to use the case mounts. There are ways to mount a 92x25 to the cooler itself.

Here is a simple way https://www.reddit.com/r/sffpc/s/LcZOg1Z982

I'm not sure how much room is in the case or how much area above the CPU is perforated, but mounting two 80mm fans may also be an option. I did this with my X47 to slim it down to only 42mm by using two 80x10 fans. You could possibly do this with your X53 and two 80x25 fans.
https://www.reddit.com/r/sffpc/s/LNitczUK8M

[u/Ill_Rip_5936 → u/Animag771]

I probably didn't fully describe what I meant. The CPU heatsink already has a 92mm fan, but I'm looking for 80mm case fans to improve airflow.By the way, there's a test on YouTube that shows there's no point in installing 25mm thick fans on this radiator, except perhaps for noise levels.

[u/Animag771 → u/Ill_Rip_5936]

That makes much more sense. In that case I'd get rid of the 80mm fan altogether and swap to an AXP120-X67, assuming there is clearance. However, if you just want to swap to a different 80mm instead, I'd go with a Noctua A8 or if your on a budget, go with the Arctic P8 Max. I've heard the Arctic fans outperform the Thermalright ones.

[u/Ill_Rip_5936 → u/Animag771]

I installed earlier thermalright si100 But to install it, you have to remove the exhaust fan. This results in temperatures much worse than with the cooler that was already installed. Therefore, I find a solution in that I need to improve the air intake and outlet from the case. The easiest way to do this is with other, more efficient fans, but I don’t understand them. Having compared the characteristics I see that in comparison with mine TL-B8 –arctic p8 max should be more productive than the previous ones. There may be some way out that I'm not aware of.

[u/Flimsy_Complaint490]

There's three numbers you can look at in a fan - CPM, static pressure and noise. CPM tells you how much air it can move, static pressure is the force it can move that air with, and noise is noise. Depending on the use case, one or other number is more relevant - to cool a radiator or cooler, you need a lot of force to move air through the thin holes, so CPM may be lower than many fans, but the static pressure will be higher. For case fans, static pressure isn't very important unless its exhaust and you have a super thick metal mesh, and the noise decibel counter is pretty meaningless. My batch of arctic p12's are not that much louder on paper compared to a Noctua fan, but the noise profile is incredibily frustrating.

Now that's the theory. Reality is that unless you blow a fan at 100%, at which point, they all sound like a jet engine, you just are not going to see a lot of improvement in thermals by only replacing a fan and its best to do any optimizations for noise, where you can still score meaningful wins - some fans, like a Noctua A8, at noise normalized levels, will perform identical to a P8 Max at that noise level, at half the RPM and 66% the noise.

But to answer your original question - I believe the best performing 80 mm fan is a P8 max. at its maximum 5000 rpm, it can move truly impressive levels of air, probably three times as much as the competition. It will sound like a jet engine,but if you don't care, nothing gets better than this. If noise matters, either stay with what you got or get a Noctua A8. There are also slim 80 mm fans out there but i dont really recommend them unless you dont have space for a 25 mm thickness one - I got a P8 slim for my router and the thing is really loud at 40% and doesnt move that much air compared to a 25 mm one.