You mention Scythe slim fans burning up as a well known problem, but this is the first I've heard of it. Sleeve bearing fans may wear out faster when mounted horizontally, so maybe that was the problem?
The short axle length compared to the fan blade diameter on slim 120mm fans puts more stress on the bearings. It's the same problem with 200mm fans, which is part of why it took Noctua so long to release both.You mention Scythe slim fans burning up as a well known problem, but this is the first I've heard of it. Sleeve bearing fans may wear out faster when mounted horizontally, so maybe that was the problem?
The Josephson C617 looks promising, with 14dBA self-noise for around $2k. And the SF101a looks like a really good value at $900 for 13dBA. From my research though, it seems that it'd be better in the long run to spend the extra money for a 1" capsule for the best low noise measurement capability.You can actually pick up a good mic kit (flat response, noise floor <20dBA) and an anemometer for way under "tens of thousands" (closer to $1200 USD).
Getting proper load testing equipment for PSU reviews would cost several thousand dollars, but there are already several sites doing good PSU reviews and while they take longer than I'd like, they cover SFX and SFX-L too.You'd need to go full SPCR mode and construct an anechoic room to get a lower ambient.
how should i decide on which one to choose? pwm or flx?
For a PWM CPU header always get a PWM fan. For chassis headers if the motherboard has a particularly bad fan control implementation it could potentially make sense to get the non-PWM fan if the controllable voltage range is more desirable than the controllable PWM range.if i have a mobo that is capable of controlling a pwm fan, would it make sense/be better to use a voltage regulated flx fan instead?
Okay, current-gen ASUS is about as good as it gets for motherboard PWM headers. No reason to get voltage control.its a asus z270i
That's somewhat true, some fans have poor PWM implementations and I think some people have complained about the Industrial Noctuas due to the 3-phase motor design.wasnt it in the past that pwm fans are more noisier because of phe pulsing ?
Alternatively, an optical tachometer and a small piece of retroreflective tape (or even a dot of white paint) will give a real-world RPM measurement even if the PWM reported speed is for some reason incorrect.Regarding RPM measurement - I refuse to report motherboard reported RPM and PWM values, especially considering that I run a Gigabyte board in my personal rig! I am currently working on an arduino based PWM testing rig for proper logging, including RPM measurement every 5 PWM steps,