Just got my Define Nano S three days ago. Can't decide if I should fill it up with Venturi, Noctua or wait a few weeks for the Corsair ML fans to come out. How good are those Venturi fans (one of Fractal Design's reps confirmed to me that you can fit the venture 140mm at the bottom if you use its 120mm mounts. So ... that's nice)?
According to the review at http://www.dvtests.com/fractal-design-venturi-hf-14-and-hp-14-pwm-test-and-review/ the Venturi's specs, as given by Fractal Design, are way off the actual specs. Noctua's given specs, on the other hand, are spot on according to the this review http://www.dvtests.com/noctua-nf-s12a-flx-nf-s12a-uln-and-nf-s12a-pwm-test-and-review/. I like fan manufacturers that have enough integrity not to bs their customers. And my case is the windowless variant so the poop color doesn't bother me much
On a side note, is it better for the case fans to be high flow or high pressure if there is a dust filters in front of them? I don't suppose dust filters are as restrictive as radiator/ heat sink fins. Are they?
Actually, if you don't mind a 3pin fan in today's sophisticated pwm world, Fractal's GP-14 exceeds its free air specs behind a filter.
Results from OCN's @ehume 15 case fan test here. I've just ordered some to find out if/how/why this fan with middling static pressure can move more air when restricted by a filter than running free. FYI - ehume's testing is some of the most reliable I've seen. So, he's not making stuff up. Altho, hoping he's made up an explanation for these results!