Guide

The BIOS used by GPD devices is provided by AMI. In addition to the AMI BIOS, the controller (EC) provided by the AMI is also involved. EC control peripherals, such as: power control, power charging control, intelligent battery management, keyboard and mouse control, screen brightness control, volume control, external monitor control, etc., 

This Bios upgrades for 7840U, 7640U version of Win 4, solving the problem that memory rate can not be modified. In the link below includes the bios installation package and video instruction of installing. Link:http://softwincn.com/gpdwin42023gjxz Click to purchase: GPD Win4 2023 Handheld Game Console

If you're wondering about the most suitable hardware platform for nuclear display Mini PCs in 2023, the answer is likely to be AMD's latest Ryzen 7040HS. With its upgraded Zen4+RDNA3 architecture, this CPU performs on par with the 13th generation Core H45. The integrated Radeon 780M provides top-notch graphics performance, surpassing that of the Core platform Mini PCs of the same period.