Atharv Joshi
Forum Moderator

Hi Jugyeong, 

Ansys Discovery Explore mode requires a minimum of 4gb graphics card and we generally recommend having 8gb dedicated graphics with updated graphics drivers. Ansys Discovery Hardware Requirements (2023 R2) - Ansys Knowledge

Explore stage uses GPU memory for discretization and maybe with 4gb card isn't capturing the geometry accurately. You can check the element size from Simulation Tab >> Fidelity >> Size Preview. 

Let me check the results at my end and will let you know. 

Thanks and Regards

Atharv