Aqui estão duas ferramentas que permitem testar e comparar o Direct 3D e o OpenGL:
O FogCity mede o Direct3D e velocidade OpenGL . (bem antigo, mas ainda funciona com o Windows 7, gratuito e portátil)
Benchmarking Software - Show how many Frames Per Second (FPS) you are getting in a corner of your screen. Perform custom benchmarks and measure the frame rate between any two points. Save the statistics out to disk and use them for your own reviews and applications.