Benchmarking the Intel Core i5 2400S, i5 2500K, and Core i7 3770K with Intel HD 2000, HD 3000, and HD 4000 graphics respectively. In looking at the Linux OpenGL graphics performance, all three Intel Sandy/Ivy Bridge processors were clocked to 2.50GHz and only four cores enabled and no SpeedStep / TurboBoost to better just compare the graphics differences between Intel HD 2000/3000/4000 graphics cores than CPU differences. Benchmarking by Michael Larabel for a future article on Phoronix.com.