Originally Posted by B NEGATIVE
If you see the airflow from a normal fan then focused airflow is a good thing.
Scythe specs are trustworthy,they dont inflate their figures (coolermaster,im looking at you here),what they say,they do.
I've seen the smoke turbulence demos
if that's what you mean. And I'm not questioning their specs - I agree that they are very honest in their specs... however, that's where my problem lies.
I can't seem to find anywhere that they actually specify what the tested (or theoretical for that matter) pa/mmH2O specs are for the GTs so it's nearly impossible to determine (they provide an almost useless P/Q curve chart
for the multiple varieties however). Thankfully on the new fans they do provide this information
- despite tom's not bothering to publish it in the article you linked. The two that are the easiest to compare are of course the D1225C12B2AP-12 and the SM1225GF12SL as they are both 800RPM fans so it's (at least in theory) an apples to apples comparison.
Airflow is easy, the GT puts in a figure of 48 m³/h (28.25 CFM) vs. the Grand Flex's 51.8 m³/h (30.5 CFM) - here the GFlex wins (although at 18dBA vs 9dBA for the GT - sone ratings unavailable for either). Despite generally agreeing with your assessment of their stats validity... I question whether or not they tested these in a completely inert anechoic chamber to measure values this ridiculously low
in both cases.
As far as pressure is concerned this is more difficult. The GFlex is listed at 0.53 mmH²O / 5.20 Pa and the closest thing I can find for the GT would be taken from the chart - which would put the highest Pa at just over 5 (is it more than .2 over or not... who knows?).
The question I have however, is whether or not directional airflow is of any benefit against a radiator. It seems to me that the very idea of using spacers, gaskets, etc... is based around maximizing pressure and dispersing airflow more (i.e. making sure that air is flowing equally through all of the fins opposite the fan) in order to avoid dead spaces or inefficient/uneven dissipation. I'm not debating whether or not these new fans will be fantastic for general cooling - I love my S-Flex's and I know I'll like these too. However, I've seen poor performance generally using the S-Flex fans on radiators... so I'm wondering whether or not this is also the case with the new ones.
Based on the specs I would guess these fans have at least similar if not slightly superior pressure to the GT's - but as I can't compare equal specs unfortunately that's purely conjecture on my part. Edited by DiGiCiDAL - 8/19/13 at 12:47pm