The doughnut test of graphics card is a method to test the performance of graphics card, which was first developed by John &: Carmack was first proposed in 1997, and has been widely used to test and evaluate the performance of game graphics. The main principle of this test method is to test the performance of graphics card in drawing complex scenes by drawing a large number of doughnut pictures with complex effects such as specular reflection, transparency and texture. Because doughnut graphics are complex and contain many real-time rendering technologies, it can fully test the rendering and processing capabilities of graphics cards. At the same time, this method is simple and easy to copy, so it has become one of the commonly used standards for testing the performance of graphics cards. However, it should be noted that the performance of the current graphics card has far exceeded the requirements of doughnut testing, so the testing effect on high-end graphics cards is somewhat limited. For today's top graphics cards, it may be necessary to use more responsible testing methods to comprehensively evaluate their performance.