Same deal. Just more usage of both GPU's. Also this problem is not related to the OpenGL or DirectX and has existed since the beginning of time ... Osu! can not decide which GPU to use. On the GPU, which is weaker than 740m - 1000 fps, and 740m - 500 fps. I think just because of that. Btw, if you're using integrated video, usage of discrete video obvious is - 0, and with intergrated video I got 500-900 fps, while with 740m only 500 max.
peppy wrote:What happens if you switch to full-screen? Looks like one of your cards is being used for windows-level rendering, while the other is being used by the game?