So I've come to notice that on my Lenovo, the dedicated GFX card (HD 8570M) doesn't seem to be used at all, even when I set the switchable graphic option to 'High Performance', the monitor reports it using the power saver option. Using OpenHardwareMonitor, it doesn't report any temperature or load at all.
I've tried with a few games (don't have many accessible right now), such as Metro 2033, Left 4 Dead 2 and Saints Row 4. I thought the first two were because the games were old, but the fact that Saints Row 4 doesn't use the dedicated GPU baffles me.
The integrated GPU is an 8650G from the AMD A10-5750M APU.
I've tried asking for assistance on the Lenovo forums, but got no response.