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Thicker Rad vs Extra fans - which is better? - Page 2

post #11 of 15
Quote:
Originally Posted by seross69 View Post

Actually what I said is exactly true if you would have read it I said the same thing you did.. A rad will radiate so much heat and it depends on how much air you can move on how much cooing you can do.. there will come a point where it dose not matter how much air you move you will not have any better results!!! simply laws of thermodynamics!!

This is true, but that is not what you said. Your statement was
Quote:
a rad will dissipate x amount of heat and as long as you can move it they will cool.

There is a performance curve on how much flowrate effects the temps of the liquid it's cooling, which will very depend on the Δtempurature, the thermal conductivity of the material cooling, in this case the air, and the flowrate of the thing cooling, which is again the air. It is EXTREMELY unlikely you could achieve airflow high enough to bring the performance curve down significantly with a fan small enough to fit into a 120mm radiator. People use the Delta 252CFM fans on radiators, and still see notable increases in performance.

In short, radiators do not have a rock solid specific amount of heat they will transfer regardless of the variables.
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post #12 of 15

Have any benchmarks for these no-name fans? Manufacturer ratings are complete BS most of the time.
Edited by OPanda - 6/30/13 at 9:06pm
post #13 of 15
Manufacuter fan specifications are meaningless. The only time you can trust those figures are if they are for an enterprise level fan. Sanyo Denki, Delta, Nidec, etc. The specifications from SilenX, Akasa, and Cooljag shouldn't be taken w/ a grain of salt.
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post #14 of 15
Quote:
Originally Posted by lowfat View Post

Sanyo Denki, Delta, Nidec, etc.

Read my mind!
post #15 of 15
Quote:
Originally Posted by lowfat View Post

Manufacuter fan specifications are meaningless. The only time you can trust those figures are if they are for an enterprise level fan. Sanyo Denki, Delta, Nidec, etc. The specifications from SilenX, Akasa, and Cooljag shouldn't be taken w/ a grain of salt.
Quote:
Originally Posted by OPanda View Post

Have any benchmarks for these no-name fans? Manufacturer ratings are complete BS most of the time.

Manufacturer specs are taken as such:

CFM rating with no resistance.
RPM Rating +/- 10%
dBA with no resistance (i.e. obstruction)

They do have meaning, it's their specs vs performance curve can be deceiving. The specs can point you in the right direction, just need to do a little homework, as I took for granted on with the SIlenX. It's like the old Russian proverb doveryai, no proveryai. Trust but verify!

I can't find anything solid on the Akasa, as everything I see is a bunch of isolated reviews on several websites. All of them positive, but nothing substantial. It's always one review here, one there.

The Cooljag fan, according to the website I linked it from, is REALLY solid. Check out the reviews on it, all of them positive.

The Delta one did amazing according to Martin: http://img87.imageshack.us/img87/9652/fantable124.png

Mind you he was running them at about 3900RPMS which is only 3/5 of what their max speed is.

Tidbit of searching shows the SilenX doesn't deal with obstruction well.

The BGears blasters already have a wicked reputation on this forum, so I trust you won't need reference for that. biggrin.gif
Edited by ZytheEKS - 6/30/13 at 10:09pm
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