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Heh... guess you need to have been around a while... yer correct, 60mm rads have never existed, but 2x40mm rads do... http://www.aquatuning.de/product_info.php/info/p1703_Magicool-Mini-II-2x40-Radiator.html
Well, a single DD 80mm rad dissipates about 990BTUs, I would guess that it would be about equivalent, although, I have not been able to find a data sheet with exact properties (for the dual 40mm).
990BTU / 3.41BTU = 290w (keep in mind, this is rounded data for a BIX 80mm single, which I would expect the dual 40mm to come relatively close to, since it states that it is based on the same design)
hahaa, show me an 80mm rad, let alone a 120mm rad that can dump 290w
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=336&products_id=22597
I was wrong, initially, however, it can't dump 990BTUs, it's almost 939BTU
~939BTU / 3.41BTU = ~275.4W
2x40mm rad != 80mm . Common method of lying with statistics, 2x40mm is (2)(40)(40) = 3200mm^2 or 32cm^2. 80mm rad is (80)(80) = 6400mm^2 or 64cm^2.Well, a single DD 80mm rad dissipates about 990BTUs, I would guess that it would be about equivalent, although, I have not been able to find a data sheet with exact properties (for the dual 40mm).
990BTU / 3.41BTU = 290w (keep in mind, this is rounded data for a BIX 80mm single, which I would expect the dual 40mm to come relatively close to, since it states that it is based on the same design)
2x40mm rad != 80mm . Common method of lying with statistics, 2x40mm is (2)(40)(40) = 3200mm^2 or 32cm^2. 80mm rad is (80)(80) = 6400mm^2 or 64cm^2.
As for how much heat it can dissipate, there's a theoretically max and then there's what you'll actually want to see. An MCR80 has a C/W of 0.10 at 1.5gpm, so it can take about 100 watts of heat before the water gets 10*C hotter than ambient. A 2x40mm at best is only half the size of an 80mm rad, so 100 watts of heat going through it will mean your water is 20*C above ambient.
In short, a 2x40mm rad will do dip squat for your loop. At best, it adds 2/9 of the cooling capacity of a 120mm rad. At worst, it reduces your flow and everything performs worse. I'd really suggest trying to fit a real radiator somehow.
Obviously what is needed is:
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=200&products_id=21622
al
wondering if that fits into a QPack