Lenovo Legion Slim 7 16ACHg6, 5900HX RTX 3080
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Reviews for the Lenovo Legion Slim 7 16ACHg6, 5900HX RTX 3080
Source: Ultrabook Review

One thing to keep in mind, though, is that Lenovo mentions that they’ve implemented the Max-Q Dynamic Boost technology on the Nvidia GPUs, which allow the system to increase the GPU’s allocated power by up to 15W when needed, while subtracting it from the CPU. That means more power can be allocated to the GPU in games, which could push the 65W 2060 in these laptops to perform closer to a full-power 80W 2060 implementation. However, what I don’t know at this point is whether this is properly supported by both the Intel and AMD variants, or is just something reserved for the Intel configuration.
Single Review, online available, Medium, Date: 01/14/2021
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NVIDIA GeForce RTX 3080 Laptop GPU: High-End laptop graphics card based on the Ampere GA104 chip. At the time of the launch in early 2021, the 3080 is the fastest laptop graphics card on the market.
With these GPUs you are able to play modern and demanding games fluently at medium detail settings and HD resolution.
» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
R9 5900HX: Mobile Octa-Core APU using Zen 3 cores clocked at 3.3 to 4.6 GHz and a Vega graphics adapter with 8 CUs clocked at up to 2100 MHz. » Further information can be found in our Comparison of Mobile Processsors.