{"id":394849,"date":"2024-11-21T19:05:02","date_gmt":"2024-11-21T19:05:02","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-my-gpu-simulation-is-slower-than-cpu-simulation\/"},"modified":"2024-11-21T19:05:02","modified_gmt":"2024-11-21T19:05:02","slug":"why-my-gpu-simulation-is-slower-than-cpu-simulation","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-my-gpu-simulation-is-slower-than-cpu-simulation\/","title":{"rendered":"Why my GPU simulation is slower than CPU simulation"},"content":{"rendered":"

<p>I ran a simple simulation involving subwavelength structures with periodic boundary conditions on both the CPU and GPU using our workstation. The system is equipped with a Ryzen 9 7950X CPU, 128 GB of DDR5 RAM, and an RTX 4080 GPU. For a 3D simulation, the CPU completed the task in 90 seconds, while the GPU took 150 seconds. I did not enable time monitors during the GPU simulation, as the documentation suggested that they could limit GPU performance. I expected the GPU to outperform the CPU in terms of speed. Could you help me understand why the GPU was slower and how to solve this problem (if possible)<\/p><p><\/p><\/p>\n","protected":false},"template":"","class_list":["post-394849","topic","type-topic","status-publish","hentry","topic-tag-3DFDTD-1","topic-tag-gpu"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t