Originally Posted by Imglidinhere
You forget that there are two separate heatsinks with that config; one for each 680M. While yes, two 680Ms output more heat than one 680MX, they're separated from one another. It's not the same as cooling a 200w TDP GPU as much as it is cooling two 100w TDP GPUs.
Glue the two heatsinks together and add a few more heatpipes?
I'd say the laptop would have to weigh over 15lb to accommodate a mini-oven and its gigantic heatsink. The battery life wouldn't be that great, probably like 15 minutes.