The AMD R9 M480 GPU has been confirmed to be Polaris with a device ID of 67E0, which means the core part is Polaris 11 (Baffin) architecture. The GPU clock is set to 1000 MHz and the equivalet frequency is 5000MHz. It’s also equipped with 4GB GDDR5 memory.
The Polaris 11 GPU will have at least 1280 streaming processors. AMD Radeon M480 may feature cut-down silicon, whereas Radeon M480X will receive full edition Polaris 11 GPU.