Thank you a lot, here is the test result for “optirun glxspheres” at my levono T420, thank you
149.571769 frames/sec – 166.922094 Mpixels/sec
171.472425 frames/sec – 191.363226 Mpixels/sec
170.859481 frames/sec – 190.679181 Mpixels/sec
160.312447 frames/sec – 178.908691 Mpixels/sec
136.165859 frames/sec – 151.961099 Mpixels/sec
138.440109 frames/sec – 154.499162 Mpixels/sec
136.312657 frames/sec – 152.124925 Mpixels/sec
137.332816 frames/sec – 153.263422 Mpixels/sec
132.376045 frames/sec – 147.731666 Mpixels/sec
136.396864 frames/sec – 152.218901 Mpixels/sec