The Razer Blade Pro also has a laughable battery life: 2 hrs 45 min for WEB SURFING. That's hilarious.

What that means is, probably less than an hour of battery life if you are actually gaming, which is the raison d'etre of this laptop.

Laughable.

What would people say if Apple made a high-end professional machine with half an hour of battery life? We'd never hear the end of it. Perfectly acceptable in the PC world, though.

Nice cherry-picking, though. The desktop-replacement gaming laptops category in general is indeed 8-11 pounds, just like I was saying:

Asus ROG G701V: 8.2 lb MSI Titan SLI: 11.6 lb Origin Eon17: 12.8 lb

Razer Blade Pro is 7.8 lb in the review I found, btw. Here: http://www.laptopmag.com/reviews/laptops/razer-blade-pro

If the ram's power use is the main problem, then that disproportionately affects low-power uses. There's no reason to think gaming would have a similarly crippled battery life.

Any idea how long the MBP lasts if you peg the GPU?

In my experience, the new 2016 15" with Radeon 460 will die in about 2 and a half hours.

I wonder if it would be possible for the OS to consolidate "hot" memory into as few modules as possible and power down the ones holding relatively cold data when memory pressure is low.

The Razer Blade and Razer Blade Pro are two different laptops.