Hi rohanth8939,
For Nano and Xavier NX carrier board, please refer to:
Considerations when using Jetson Xavier NX module with Nano devkit carrier - Jetson & Embedded Systems / Jetson Xavier NX - NVIDIA Developer Forums
For TX2 NX with Xavier NX carrier board, please refer to:
Announcing Jetson TX2 NX - Jetson & Embedded Systems / Announcements - NVIDIA Developer Forums