I was suspecting this is a problem for very long time and recently tested it to have some proof. In any test like humanbenchmark at webbrowser I get like 150-200ms reaction time, even at win32 application based tests. In CSGO I get 200-300 ms. There is a chance that I get 150ms but it is like 1 in 100 tries while at system I can repeat under 200ms. If I try to react to sound I can get like 100ms. I am using laptop with I5 3210m and Intel HD4000, Windows 7 64bit, no vsync, everything on lowest settings 800x600, 75hz external screen, 75fps or 300fps no difference, if using discrete 610M card there is no difference, raw input on off no difference, monitor scaling, GPU scaling no difference, everything set to max performance in graphics, even disabled manufacturer software for power management and it made difference and everything works faster... only not that poor CSGO reaction time. I used any possible thing to get more performance, disabling every neccesary program, service, unlocking cores, setting hardware to MSI mode, disabling HPET, updating drivers, switching usb ports, my DPC latency is now between 50-300us at idle (ethernet card makes biggest spikes to 300us, without it it doesn't exceed 100us). I changed thermal paste a couple of months ago, cleaned laptop inside, so there is no temperature throttling. It is visible too in online game. I know how CSGO works and it sometimes seems ridiculous, but it is not about that since I tested it offline. I have been playing FPS games for at least 15 years and it is recently getting worse. Is this hardware not able to keep up while getting 300fps on stupid reaction time map to get accurate results? It should not be my monitor because I would get worse reaction at browser tests too. Would ingame reaction time suffer because hardware isn't able to keep up while doing 300fps? Any ideas?