- Joined
- Jan 28, 2018
So, these fans arrived during the downtime. The P12 are very good fans and I can recommend them generally, especially for the price but they are not as silent as the NF-A12. You do hear them, especially at some specific RPM they just seem to make a weird bearing noise. You can avoid that by avoiding these speeds and if you have several of them, it makes sense to vary their speed somewhat so they don't all resonate together. Not ideal but it works, especially for their price. Mind you, that noise also isn't loud or even disruptive, but it is there. The NF-A12 are completely silent by themselves, all you hear is the air they move. That is impressive, but for the price they better be. I'll stick to the NF-A12 because I sit directly in front of the computer.I ordered both two Arctic P12 (~7 euros a piece) and two Noctua NF-A12. (~27 euros a piece) ~55 euros for two fans is staggeringly nuts so I expect them to be noticeably better than the Arctic ones or they go back. I have the feeling I can get the card really quiet even in demanding games, which would be nice. I wrote my own daemon who turns off the fans if the card is off and otherwise just keeps them to certain speeds at preset values. (fans adjusting up and down with heat are more noticeable than fans that just run at one constant speed all the time)
An interesting thing I noticed, when the GPU gets turned off when not in use, it also loses all settings you applied and when you apply settings while it's off, they don't stick. (the interesting thing is here, at least in this setup, if you run a game in Linux and minimize the game window, this will also put the dGPU to sleep until you go back to the game) That's why my undervolting via amdgpu drivers didn't work. You'd think the drivers just apply the settings automagically whenever the card gets turned on (the driver isn't unloaded after all) but that simply isn't the case, they reset to default, so I expanded the fan daemon to not only turn the fans on and off, but also apply the settings I chose to the card whenever it's in use. (power state D0)
To the performance of the setup - absolutely amazing. I just set the fans to 50% of their speed (fancy fan profiles don't really make sense, they're almost not audible at up to 50%) and when the card is working maxed out for an extended gaming session it maybe reaches 75C at the very worst (with 70C on average, less when the game isn't putting a big load on the card) which is perfectly fine for this card. I haven't had a computer with a modern, actively cooled GPU which is that silent while gaming in ages, if ever. It's impressive what a difference quality fans make. I could probably knock an additional few C off by renewing thermal paste and building a vent to make sure all the air the fans push in goes over the heatsink but eh, this is good enough. GPU manufacturers should offer standardized harness shrouds for their cards so people can put their own fans in. It'd be more ecological too.
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