How do laptops manage to deliver very decent performance despite drawing just a fraction of how many watts a desktop draws?

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Take a laptop with a mobile graphics card. Mobile graphics cards obviously perform worse than their desktop counterparts. I would say they perform like the next lower tier on desktop (e.g. an RTX 3080 Mobile performs about as good as an RTX ~~3070~~ 3060TI desktop card according to UserBenchmark (yeah, I know, not the best site, but close enough in this case). But the mobile card still only less wats.

Example: [https://www.youtube.com/watch?v=Hz9GfxCAXgs](https://www.youtube.com/watch?v=Hz9GfxCAXgs)

This laptop uses a 200 watt charger. How can a 200 watt charger power a 3070 and an i9 processor? Even if they are just the mobile variant, isn’t that almost like expecting a 200 watt power supply to run a 3060 TI and an i7 processor from the same generation? Heck, we don’t even run 75 watt cards like GTX 1650s and 60w CPUs like some i5s and i3s on 200 watt on desktops. So what gives?

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4 Answers

Anonymous 0 Comments

Well for this one you have 32 gigabytes of RAM paired with an NVMe hard drive. Plus the GPU is designed for mobile. And initially at the beginning of the session it’s going to have decent thermals, the longer you use it the hotter it’s going to be and the more it will downclock itself. Unless they did really good with thermal construction It will never compare to a desktop. As for the wattage? That’s beyond on my expertise, I know the mobile variants consume far less power and are designed to change there clocks/volts on the fly.

I’m always impressed by the malleability of Intel on mobile. I’d never buy them for a desktop but they are really good in a mobile platform. Complete opposite for AMD, they are crap for mobile, but they are the king of desktop.

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