Hi, the following are the specs of my computer: Asus P8Z77-V- LX2 Motherboard Intel i7-2600CPU @ 3.4GHz 16GB RAM DDR3 668.5MHz NVIDIA GeForce GTX 780 Ti I lag on almost every single game, including League of Legends, Maple Story, DotA 2. Most of these does not lag on my low-mid end laptop and I find it very annoying why has it been lagging on my PC. I thought it was a faulty graphics card back then when I had the ATI 6970M graphics card then I upgraded to the GTX 780Ti and it still lags. I notice miracle happens when I was using my 6970M graphics card, whenever I uninstall and re install the driver of the graphics card at the "Manage my computer" program, the lag disables and I am able to play all games with no lag. However, after restarting, the lag resumes and I must repeat the same step to remove the lag. However, with my GTX 780Ti, it does not work.