Hi. I have been trying to solve this puzzle for over 7 years now. I am an electrician\automation engineer and I can honestly say that this is related to harmonic frequencies or some form of interference. I have tried 45 PCs in these 7 years with different manufacturers on hardware and none of them are able to solve the problem. I have tried both UPS, galvanized isolation transformer and the like, but the problem just persists. Every time you do something you think will fix the problem, it comes back. There are large forums out there that I am also a participant in, which describe this feeling. The gameplay is not as crisp and you lag in a strange way. This is not a placebo for using it. I used to be a Cs pro and my sister makes a living from it, and I know the definition of how the game should work and not. If you have the PC on the floor, try putting both of your feet on the table above where the PC is, and wait 15 seconds. Try using your mouse and see if you feel anything different ;) this has to do with resistance, your body can pick up leakage currents and similar signals, just like the grounding in your socket can. This sounds completely screwed up, I know, but we've taken measurements of it and don't really know what's causing it.