These are notes written up about the XG Mobile connector which is found on the Asus ROG Ally as well as some ROG Flow models. The goal is to build a custom eGPU enclosure that is compatible with the XG Mobile connector.
The XG Mobile Cable comes with ROG XG Mobile and can be purchased from a [parts store][2] for $129 USD. It has a male XG Mobile Connector on one end and three cables on the other end: two 40-pin FPC cables and a 8-pin connector. The cable carries a USB-C connection, PCIe x8 signal pairs, PCIe clock, an SMBus/I2C connection, and some sideband signals for power detection and hot-plug support.
The pinout can be obtained from the [GV301QC schematic][1] (page 69).
Pin |
Name |
Pin |
Name |
C1 |
PCIENB_TXP0_C |
D1 |
PCIENB_TXP5_C |