He has already stated that this happens with previous builds as well:

Tried to reinstall drivers, didn't work, i'm clearing memory, and never seen any fps drops. It worked fine before i implemented online multiplayer i think, but i have backups from before that and they lag the same way now, so i don't think it's the code, none of my friends i tested multiplayer experienced any lag. So i think it's my computer...

Oh didn't notice that part. Sorry. Zodaz: Do you have any restore points from before you installed all those games you tried?