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Old 07-14-2019, 03:15 PM
jonnyguru jonnyguru is offline
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Originally Posted by corsican View Post
But why even have 0 fan mode then? FDB fans make no noise and if they last that long why not keep them on minimum speed n keep PSU temps down
Zero RPM mode has nothing to do with prolonging the life of the fan, though it is a perk.

PSUs don't generate much heat, so active cooling isn't necessary except for under extreme circumstances. Take, for example, fanless PSUs in the market. They're LITERALLY derated PSUs with the fan removed.

The change from DBB to FDB in Corsair PSUs, even though they're more expensive, was not because of longer life. It was because of bearing noise from DBB at low RPMs. The reason for Zero RPM mode is to reduce noise from the air moving itself and to reduce power consumption.

Originally Posted by corsican View Post
If so that's more of a reason to leave fan on 0-fan mode I guess but the problem is my case is a bit weird it got the PSU at the top which means I gotta leave the fan on (cause the hot air rises ... basically the PSU acts as a second rear exhaust fan)
That makes you the exception, not the norm. 10 years ago, the PSU on top was the norm, and the PSU >>WAS<< part of the PC's overall cooling system. Back then, PSUs were also a lot less efficient and needed active cooling. Now PSUs are on the bottom. Typically covered with a shroud. Though I admit that when there is no shroud, I do tend to mount my PSUs with the fan facing up to help cool the GPU.

Last edited by jonnyguru; 07-14-2019 at 03:19 PM.
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