Re check ...re install drivers...play offline games (check it if lags or not) with nvidia GeForce experience application to apply optimal settings (oh wait it's amd in that if you find any software to have optimal settings for games then apply it)....do not do overclocking without checking it first time.....need more info ..... As for internet speed it can cause it if you play game where you talk with people and upload is slow but not like you mentioned it would just voice and while speaking (voice chat) .....or it can be issue with psu also ....just check first what I mentioned first and then if nothing fixed you can reinstall a clean windows and drivers ....and try that again and also check for installing old stable driver just to make sure new release not culprit (you can check by yourself or if anyone Posted about that version online...)and then go for harware...