What type of desktop computer is good for handling online games without lagging

only your computer is not responsible for your lagging of games but also your internet speed might be slow. check your internet speed and if you find the same problem then upgrade your motherboard and microprocessor as per your games requirement. the latest speed of microprocessor for games is 3.2ghz in core 2 duo and 3.0ghz in i7 processors and compatible motherboards are Intel dx38 and dx48 series