I can safely say that no one has seen this before: a custom laptop that a modder has installed a desktop (yes, the desktop) NVIDIA GeForce RTX 4090 graphics card into... it's a monster, it's bloody heavy, but it's so awesome to see something like this done. Check it out:
The Chinese modder used a barebones OEM design that includes an AMD Ryzen 9 7950X3D processor, which is a desktop CPU. The design of this laptop is so custom that you could replace the motherboard (the stock board is an ASUS ROG STRIX B650I Mini-ITX motherboard), with 32GB of DDR5-6800 memory (no SO-DIMM here, folks) and even an Intel Optane P5800 SSD.
Now, for the GPU: the modded laptop rocks a custom blower-style GeForce RTX 4090 with a 450W TDP, with the power connector placed perfectly for the modded laptop. The modder even added a custom speaker system, with 2 x 20W speakers inside. So cool. The GPU keeps within its 450W power consumption, capable of playing games for hours and hours without any stability problems.
The mod of this laptop itself is a pre-order customization, with the modder explaining that one could be crafted to house the Intel Core i9-14900K processor (up to 200W of power).
But...
This laptop doesn't include a battery, because it would be drained in about 0.1 seconds... so it can't be run without being plugged in, like a regular desktop. This is because between the CPU and GPU (and the rest of the components) you're going to be driving 500-600W+ of power.
On the other side, the custom Ryzen 9 7950X3D + GeForce RTX 4090 laptop will STILL fit inside of a backpack, but it weighs 6.7kg on its own, and 8kg with the PSU. Heavy stuff.