xomaxhox

To jump on this thread, tested torques were mentioned in the video but it would hard to achieve those. A hex bolster like in the pic could be a good addition for the more automotive style uses. I haven't seen this on ratcheting screwdrivers before though, and I assume for good reason.

It will run them all at the same % regardless of the RPM levels. So 30% on 1500 rpm or 30% on 2200rpm will be 30% of the maximum RPM the fan can run. 

Speed of fan is irrelevant overall. Both PWM and DC controlling is done with % of fans max speed. With DC it means that fan connected to rpm sensor header is used as baseline. Controls are set for it, but only in sense where you setup control based on speed of that fan. All connected fans will receive same amount of voltage that would correspond to master fans rpm. Same with PWM, except that fans are already getting full 12V and % just corresponds to how many pulses fan will get per second.
 
Overall, motherboard heder will only supply 12V max. You can't run fans over their rated rpm unless you give them more than 12V.

UMMMM, my bad!!!   just realized it's actually a Thermaltake commander, lol
 
https://www.amazon.co.uk/gp/product/B015KG6HP0/

Great, thanks for confirming @LoGiCalDrm and everyone else!
 
Re molex, I had issues with the SATA cables from my CX750M not being able to go into my SSDs so am currently using the set of molexs coming from the PSU with a molex-SATA adaptor for the SSDs.

Your best bet would be to get a cheap externally powered PWM 'splitter', This alleviates the worry of drawing to much current from your onboard header.
cheap option

you can do that even without it. using speedfan.
 
@xomaxhox yeah it should be fine. depending on the splitter. if it takes power from molex then youre good. i also only have 2 header because i run itx and i use a phobya pwm splitter. i have 9 fans taking power from sata and pwm signal from the chassis fan header. of course you loose the ability to control them individually but in most cases i find that not to be needed anyway. software like speedfan also helps with controling them alot. bit rough to set it up but once you get how its done its a pretty neat piece of software. i prefer it over solutions that mobo manufacturers throw at you like asus ai suite for example.

It should work fine if you power everything through molex and use CPU header as a control point .