I'm thinking this might be another good reason to get 3070's now and then add the 3590's in certain places with smaller heat sinks after they arrive to fill in any gaps..I come up 9556cm², good for 135W passive cooling or 382W active cooling. That heatsink has a thick base so it is good for the unbalanced heat load of COBs. My only concern would be if you ran it active cooled and packed the wattage on there, you would not get enough spread.
In other words a heatsink that shape should be good to cover about 12" X 36" with bare emitters. You could increase spread if you used COBs w lenses and lifted it higher above the canopy, but it would not be as effective as spreading the COBs evenly above the canopy.
Nice fans!Just thought I would share. I haven't seen anyone use the 12" from heatsinkusa yet so here ya go View attachment 3349161 View attachment 3349163 View attachment 3349165 View attachment 3349166
What is the perimeter of that one?Let's say I use a 4.9" profile, could someone help calculate what is needed for above mA's. Much thanks.
Not sure about perimeter. Your talking to a retired roofer who is lucky to absorb anything. I know a perimeter is on a roof, all the outside edges.What is the perimeter of that one?
Here you go http://www.heatsinkusa.com/content/AvailableProfiles2015.pdfNot sure about perimeter. Your talking to a retired roofer who is lucky to absorb anything. I know a perimeter is on a roof, all the outside edges.
I've done roofing, for myself. Detailed work. And it is confusing about special meaning to words. I forget the relevant date is over in a chart listed in an FAQ.Not sure about perimeter. Your talking to a retired roofer who is lucky to absorb anything. I know a perimeter is on a roof, all the outside edges.
No, they mean inches. It's perimeter. Not area. Once you multiply it by length, you get inch*inch, or square inch, Mr. degree in physics.I've done roofing, for myself. Detailed work. And it is confusing about special meaning to words. I forget the relevant date is over in a chart listed in an FAQ.
The 4.9 inch profile says it has a perimeter of 35.270 inches, but they mean square inches. OK, hold that thought.
http://www.heatsinkusa.com/content/AvailableProfiles2015.pdf
For passive the thumb rule is 110w/cm^2 and 25, btw, for active.