ty_gerUsing the term "low impedance" or "high impedance" to describe a PWM fan's air flow is STUPID. That's MY problem.

Couldn't they use any other term? What's wrong with static pressure or CFM or any other already available measure of airflow?

PWM is an electronic feature. High impedance, or low impedance, is an electronic design characteristic.

Fixed it for you.
It seems to be a problem for you.
High impedance, low impedance is NOT only terminology used in electrical design, get over it.
p.s. is "stupid" a technical term?

Caring1Fixed it for you.
It seems to be a problem for you.
High impedance, low impedance is NOT only terminology used in electrical design, get over it.
p.s. is "stupid" a technical term?

Air impedance is a term used in thermodynamic literature. It is in the same definition as resistance. Obviously, you use a higher impedance fan when case flow is highly impeded.
I'm so happy with xbox consoles recently. It has been a favourite of mine to use backward impeller fans the sort HIS used to customise their gpus. So silent and emissive.

I don't know if anyone noticed the "ketchup and mustard" cables on the fine and it was going so well but that killed it.

High SP fans lost their "rai·son d'être" back in the 90s when radiators were 30 fpi ... with todays 8 -15 fpi rads... the need for high DP evaortated. As for case fans, any decent case deisgn of the last 20 years are has enough fan mounts that again high Sp just doesn't have a role.

TurmaniaA bit expensive on par with noctuas. But can it beat the noctuas?

Noctua lost the crown 7 years ago, Take the Noctua 1500 rpm Fans off a Noctua cooler and your CPU drops a whopping 3C ... at 300 less rpm ! ! ! Put them at the same speed (1200rpm) and your CPU is ***6C*** cooler. The new Silent Wings 3s are up there with the Phanteks. ... and often half the price. Newgg has them on special every 3 -4 months for $10.99 nut usually %12.99 - $14.99

www.overclockersclub.com/reviews/phenteks_f140/3.htm

Here again we see Phanteks winning the day against everything they through at it

The Phanteks PH-F140HP/TS is the clear winner in every respect. It edged out the new Noctuas every step of the way, delivering the best overall results of any fan we’ve tested thus far. To top it off, it had cleanest, smoothest sound of all the new fans in this roundup. If we had to start from scratch, this might be our new reference model.

Our current 140 mm reference fan, the Noctua NF-P14 FLX held its own against the newcomers. It didn’t cool quite as well as its successors but its acoustic character is still amongst the best you can find in a 140 mm model. For many, the new models’ improvement in cooling ability isn’t substantial enough to offset the superior sound of the older model. The fact this model has been discontinued is a shame — if you want one, get it now while you can.

The Noctua NF-A15 PWM and NF-A14 FLX followed close behind the Phanteks in our thermal performance test. The A15 has a smoother acoustic profile than the A14 but both sound fairly good to the ears. However, they share the misfortune of living in the shadow of the P14. The A15 and A14 have a rougher, muddier sound and neither is worthy of being a true successor.

Yes, years ago, we all read those posts with the Nocs crushing the competition ... but it's time to stop parrotting those old posts and look at what's changed over the years... look at the data .... remember when gramps would the "Oh [insert brand name] is the Cadillac of [whatever was the subject of discussion". Well today that saying is meaningless as most buying a new car would say '"What's a Cadilac". But my 88 year old dad still uses that expression. I have fond memories of my ugly Nocs ... and they were top dog .. in their day. With my last build containing 10 rad and 6 case fans ... it's not a hard choice:

a) Buy 11 new fans for $121 ... that match visually and acoustically with the 5 that came with the case, or
b) Buy 16 new fans for $400 ... that are louder and don't cool as well

For those unfamiliar with the letter designation F140 meas 140mm fan and the letters after designate the frame ... some are round, some are square depending on what they are mounted in ...another st of letters indicates 140mm fan w/ 1200m mounting screws.