As per powergpu.com, ASUS ROG XG Mobile is an external GPU dock with a built-in NVIDIA mobile GPU GeForce RTX 3080. It uses its own ROG XG Mobile Interface to connect to a PC, and at the time of writing, it is exclusively for ROG Flow X13.
The built-in GPU GeForce RTX 3080 Laptop GPU is the latest mobile high-end GPU with Ampere architecture, with 6,144 CUDA cores, 2nd generation RT cores, and 3rd generation Tensor cores.
ROG XG Mobile is equipped with 16GB of GDDR6 memory operating at 14Gbps as VRAM and came with a memory bandwidth of 448GB / s by connecting to the GPU core with a 256bit memory interface.
The 280W power supply unit is built into the housing with a 208 x 155 x 29.6mm body size. When connected to ROG Flow X13, it also functions as an AC adapter that can supply power to the laptop computer side via USB PD.
The main body’s weight is about 1 kg, and even with ROG Flow X13, it is less than 2.5 kg, which is a portable level.
In addition to HDMI 2.0 and DisplayPort 1.4 for connecting to an external display, ROG XG Mobile is equipped with USB 3.2 Gen1 (4 units), Gigabit Ethernet, SD card reader, etc.
The ROG XG Mobile Interface that connects ROG XG Mobile and ROG Flow X13 is a combination of a PCIe 3.0 x8 connector and a USB Type-C connector. While the CPU of the laptop computer and the GeForce RTX 3080 Laptop GPU are connected with PCIe 3.0 x8. Ru.
When you connect the ROG XG Mobile Interface, the application for enabling ROG XG Mobile will start on the ROG Flow X13 side, and if you consent to switch from the dGPU built in the laptop to ROG XG Mobile, ROG XG Mobile, and ROG Flow X13 Connection processing is started.
This process is completed in less than 20 seconds, and the GeForce RTX 3080 Laptop GPU can be used with ROG Flow X13 without rebooting.