So, I've had this problem since I TF2 was released. Well, actually, my old laptop sucked so much that I had constant lag, but then I bought a new laptop that's supposed to handle gaming quite well. And as far as I know, Source games aren't particularly resource-hogging. Now, on to the problem - Lag. Lag that I can't possibly explain, which is why I'm begging for help. I've made a topic on this before (maybe a year ago or something), but no one replied, so I'm going to make one more attempt. The lag I'm experiencing is your typical low fps, made worse by large numbers of players and effects and whatnot (usually around 20 fps when nothing is happening, gets down to nearly 10 fps when some action is going on), resulting in slow, choppy movements on my part and attacks that are impossible to anticipate because when I see it and react, the game has already decided the outcome. You get the idea. What makes this strange is that when I turned down all graphics setting to the absolute minimum (not counting console commands to decrease graphics further), my fps went from an average of ~15 to an average of ~25, which is still far below what I know I can get (60~80 fps). It's also worth noting that my fps is pretty much not affected by my ping. At all. Ok, so I also had burninggibs and high resolution, but the point is that I can get high fps with decent graphics on a good day. This lag usually comes in "waves" that last some days (if I first start lagging, it takes a while before things are normal), which is especially weird as I can't think of an explanation as to why it comes and goes like that. It's just weird. Sorry, I know it seems stupid to make a new topic about such a common problem, but I'm convinced this is not normal - and I'm desperate to know what I can do. And no, I don't want fps configs - if you paid attention, this should be obvious.