AMD R790 Thermal Disipation

[Shintai]

nope, to show one example of an AMD rollercoaster board and one example of one Intel nonrollercoaster board doesn't prove a point.
look 144 AMD boards that aren't rollercoaster (14 that are) http://www.newegg.com/Product/Produc...nufactory=1521
and look 96 Intel board that are rollercoaster
http://www.newegg.com/Product/Produc...d&Order=PRICED

You make a mood point. fact is we can show about an equal number of each with the same rollercoaster heatsinks. not because they need them as such. but because people buy blink. Rigth now its abit more with Intel, but thats because Intel got the performance crowd and enthutiast boards are targetted at that. 96 got, 238 doesnt. So again, whats the point in terms of TDP?

Remember?

Well one of the nice features of thermal dynamics is that you can just make a bigger heatsink and it'll keep quiet and cool but you'll get the rollercoaster style of heatsinks that have now become popular on Intel boards

Also your southbridge note:

I'd also light to note that under 5w doesn't require any heatsink (unless you want to overclock it)

So wrong wrong wrong wrong. You think even the lowend boards with a small northbridge heatsink would have a heatsink on the southbridge if it wasn´t required with razor thin margins?