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The 60mm fan is connected to the motherboard CPU header and reacts to CPU load. Which means the fan spins faster each time the CPU reaches 100%, even if it's only for a very short time. This is probably overkill but I set it up like that years ago thinking it was the safest way to keep the PSU at low temps without any other way to monitor it.
I had in mind to change that and link it i.e. with CPU temps, but I never did. Knowing I am much picky with noise, this probably tells the system is indeed very quiet. I can say I don't hear it unless I focus on that, and then a really low hum can be heard I guess (the case is behind my monitor). Because of the CPU load I also sometimes notice the fan increasing speed for a while, but that's still low level noise, nothing to compare to what a Flex does in general.

Haha yeah! My solution has at least a little angle on top to let the air go down reaching the PSU! (Probably doesn't change a lot actually)

<blockquote data-quote="BaK" data-source="post: 220834" data-attributes="member: 431">The 60mm fan is connected to the motherboard CPU header and reacts to CPU load. Which means the fan spins faster each time the CPU reaches 100%, even if it's only for a very short time. This is probably overkill but I set it up like that years ago thinking it was the safest way to keep the PSU at low temps without any other way to monitor it.I had in mind to change that and link it i.e. with CPU temps, but I never did. Knowing I am much picky with noise, this probably tells the system is indeed very quiet. I can say I don't hear it unless I focus on that, and then a really low hum can be heard I guess (the case is behind my monitor). Because of the CPU load I also sometimes notice the fan increasing speed for a while, but that's still low level noise, nothing to compare to what a Flex does in general.Haha yeah! My solution has at least a little angle on top to let the air go down reaching the PSU! (Probably doesn't change a lot actually)</blockquote>

[QUOTE="BaK, post: 220834, member: 431"] The 60mm fan is connected to the motherboard CPU header and reacts to CPU load. Which means the fan spins faster each time the CPU reaches 100%, even if it's only for a very short time. This is probably overkill but I set it up like that years ago thinking it was the safest way to keep the PSU at low temps without any other way to monitor it. I had in mind to change that and link it i.e. with CPU temps, but I never did. Knowing I am much picky with noise, this probably tells the system is indeed very quiet. I can say I don't hear it unless I focus on that, and then a really low hum can be heard I guess (the case is behind my monitor). Because of the CPU load I also sometimes notice the fan increasing speed for a while, but that's still low level noise, nothing to compare to what a Flex does in general. Haha yeah! My solution has at least a little angle on top to let the air go down reaching the PSU! [SIZE=12px](Probably doesn't change a lot actually)[/SIZE] [/QUOTE]

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