PX3 and PX6 are both processors designed by Rockchip, a Chinese fabless semiconductor company that specializes in system-on-chips (SoCs) for mobile and embedded devices. Here are some of the differences between the two:

  1. Architecture: The PX3 is based on a quad-core ARM Cortex-A9 architecture, while the PX6 uses a dual-core Cortex-A72 and quad-core Cortex-A53 configuration.

  2. Clock speed: The PX6 has a higher clock speed than the PX3. The dual-core Cortex-A72 runs at up to 1.8 GHz, and the quad-core Cortex-A53 runs at up to 1.4 GHz, while the Cortex-A9 cores in the PX3 run at up to 1.4 GHz.

  3. Graphics: The PX6 has a more powerful graphics processing unit (GPU) than the PX3. The PX6 uses a Mali-T860MP4 GPU, while the PX3 uses a Mali-400MP4 GPU.

  4. Manufacturing process: The PX6 is manufactured using a 16nm process, while the PX3 is manufactured using a 28nm process. This means that the PX6 is more power-efficient and can handle more complex tasks.

  5. Memory support: The PX6 supports LPDDR4 RAM, which is faster and more power-efficient than the LPDDR3 RAM supported by the PX3.

Overall, the PX6 is a more powerful and efficient processor than the PX3, with a faster clock speed, more powerful GPU, and support for faster and more power-efficient memory. However, the PX3 is still a capable processor that is suitable for many embedded and mobile applications