You can't upgrade a motherboard, you can only replace it. And usually one will replace the CPU and the RAM also with more modern, faster ones.
But that's only for a desktop. For laptops, it can't be done.
Hello CNET! so I currently own a HP x360 and was wondering if it is possible to upgrade the motherboard on it. I have searched online and haven't found much info on upgrading laptop motherboards. Is it possible to even upgrade my motherboard? I don't have much knowledge on hardware and help would really be appreciated.