How can this be possible...
I have a full HD playback enabled motherboard with its integrated ATI Radeon HD 4200 graphics but when I try to play a full HD video, it is lagging a lot, although I have all the display drivers installed and my ATI control center shows clearly that the system is running on the integrated 4200 card.
But when I try my not-integrated Ati Radeon HD 2400 series graphics card, the full HD videos run smoothly.
How can this be? It doesn't make any sense? Does it mean that 4200 is worse than 2400 series?