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Originally Posted by unregistered
I have stated clearly that thin rads are superior with lower speed/noise fans
- feel free to draw your own conclusions
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Bill, I'm especially interested in low noise and started working with your TMT data after seeing the above several times. I am now well confused... Here's why.
I began by comparing the cooling of the Becooling 5x5 and the Big Momma since the airflows are damned near identical. Then I tossed in the 5x10, assuming that it doubles the 5x5's airflow for a given pressure drop. Here are the rough numbers I pulled from the graphs at 1 GPM:
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5x5 5x10 Big Momma
CFM BTUs CFM BTUs CFM BTUs
.015 20 290 40 600 20 450
.050 50 400 100 850 50 900
.150 90 510 180 1175 90 1500
.250 120 580 240 1350 120 1850
Your point about frontal area is justified easily; upgrading from 5x5 to 5x10 is A LOT better than pushing more air through the 5x5.
Now, thinness isn't so clear. While the 5x10 needs less fan and noise for a given airflow, the HC dumps more heat per CFM. And it looks like a double-120 HC could compete with or beat the 5x10, even in a low-airflow scenario. At the extreme, such a HC could get 30ish CFM with one undervolted fan, right?
Does my argument hold water? Are both the revised dissipation charts and the airflow charts correct? Did Phaestus distract me to much with all his talk of a porn site?