Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. GL_RENDERER = GeForce GTS 450/PCIe/SSE2 GL_VERSION = 4.6.0 NVIDIA 390.87 GL_VENDOR = NVIDIA Corporation VisualID 39, 0x27 298 frames in 5.0 seconds = 59.508 FPS 294 frames in 5.0 seconds = 58.794 FPS 300 frames in 5.0 seconds = 59.996 FPS xwininfo: Window id: 0x6800002 "glxgears" Absolute upper-left X: 1048 Absolute upper-left Y: 134 Relative upper-left X: 0 Relative upper-left Y: 0 Width: 657 Height: 530 Depth: 24 Visual: 0x27 Visual Class: TrueColor Border width: 0 Class: InputOutput Colormap: 0x6800001 (installed) Bit Gravity State: ForgetGravity Window Gravity State: NorthWestGravity Backing Store State: NotUseful Save Under State: no Map State: IsViewable Override Redirect State: no Corners: +1048+134 -1495+134 -1495-416 +1048-416 -geometry 657x530+1046+111