Hello, After playing GRID and GRID 2 flawlessly, I am finding I am encountering simultaneous video and audio glitches sometimes a couple of times a second, but sometimes not at all. This happens when I let the game automatically change the video settings, or use the NVidia GeForce experience choose the video settings. Are there any recommended settings for an AMD Phenom II X4 945 (Quad core 3GHz), 8Gb RAM, and an NVIDIA GeForce GTX 550 Ti? Thanks,Ian