The SPECviewperf 6.1.2 OpenGL benchmark suite consists of six runs. I chose two of them, the Advanced Visualizer and ProCDRS, as they are sufficient to get an impression about overall performance.
The M7MIA from Biostar seems to like OpenGL applications, as it scores an even better position in this benchmark run. Also DFI's motherboard finishes second. Unfortunately, the A7M266 from Asus is only the last but one.