You need to know the heat output of your GPU, and add that to the electrical power dissipation of the TEC (V * I), and that will total the heat load your heat sink/fan will have to deal with.

Nvidia’s ecosystem saw diverse developments, from a YouTuber’s homemade Peltier GPU cooling test to dual-GPU PhysX performance boosts and the company’s unveiling of quantum-AI tools. While the Peltier ...