Originally Posted by maarten1210
So it was louder meaning they had worse fans or they had good fans but running at higher speeds because other components weren't the best of the best.
We should compare singles vs singles instead of duals vs duals (Aluminium fins aren't for me)
I'm no fan of the ALC / AIO coolers, believe me, I'm surprised that one was ever sold. And yes, the aluminum fins bother me but so does the use of tin solder and the DIY Rads. Will they last 5 years ?.... I guess we'll know come 2016 or so.
Take those 2600 rpm fans away and the H100 gets trounced by the better air coolers. The Swiftech on the other hand does what it does at only 2,000 rpm..... still far too fast (and noisy) for my taste. Going from 2000 rpm to 2600 rpm is good for about 25% extra cooling so we can say that's the expected performance premium of DIY components. That would put a premium DIY 120mm system about 62.5% of the performance of an H100
As for the singe vs double performance comparison, that wasn't the intent..... but most air coolers will beat out any ALC 120 coolers .... it takes a 240 ALC unit to compete with PH-TC14-PE, Silver Arrow or DH14. But yes, when sizing rads for large engines at power plants and in building heating / cooling systems, radiator performance is quite linear with surface area.
Originally Posted by WiSK
But isn't the UT60 full copper and the H100 is aluminium. Of course frontal area is very significant, but thermal conductivity and total surface area is not negligible.
Agreed..... As above....I'd expect a 25% difference in conductivity .... by no means a carefully controlled scientific analysis there, but I bet I'm in the ballpark
Originally Posted by Jakusonfire
Thickness and materials do increase the efficiency with which heat is transferred but they will be mild differences ... and as has been shown in lots of tests, very dependant on airflow speed. ....
The efficiency of heat transfer from radiator to air does vary with thickness and other factors but at normal usable fan speeds it is only a small percentage difference between the thickest rads and the thinnest rads. Thick rads and dense rads are able to maintain their effectiveness at high airflow speeds better than thin, low density rads but at lower airflow speeds the differences are tiny, and start to favour thinner less restrictive rads at lower fan speeds.
Agreed .... I put together some numbers on post 546 in this thread ... along with a downloadable spreadsheet
But here's the long and short of it for360 Rads from Alphacool w/ one fan in push based upon Martnsliquidlab testing .... number in parenthesis are estimates in push pull. At 1800 rpm, almost doubling the thickness from 45 to 90 gets ya about 10% more cooling.
@ 1,000 rpm :
Aphacool XT45 - 149 watts @ 10C (180)
Aphacool UT60 - 151 watts @ 10C (183)
Aphacool Monsta - 154 watts @ 10C (186)
@ 1,250 rpm : Phanteks fan speed *
Aphacool XT45 - 183 watts @ 10C (222)
Aphacool UT60 - 188 watts @ 10C (227)
Aphacool Monsta - 197 watts @ 10C (230)
@ 1,400 rpm :
Aphacool XT45 - 204 watts @ 10C (247)
Aphacool UT60 - 210 watts @ 10C (254)
Aphacool Monsta - 223 watts @ 10C (270)
@ 1,800 rpm :
Aphacool XT45 - 257 watts @ 10C (311)
Aphacool UT60 - 269 watts @ 10C (325)
Aphacool Monsta - 281 watts @ 10C (340)
@ 2,200 rpm :
Aphacool XT45 - 307 watts @ 10C (371)
Aphacool UT60 - 326 watts @ 10C (394)
Aphacool Monsta - 365 watts @ 10C (461)Edited by JackNaylorPE - 10/13/13 at 8:33pm