Looking for a gaming desktop that can run lag less?

If you're building to a budget and you want a powerful gaming machine then you should build your own, you'll end up with a much better machine that's exactly what you wanted it to be. Also, the main manufacturers nearly all use cheap motherboards and hide the settings in the BIOS that you would use for overclocking, just in case you're the sort of fool who would set all the voltages to the maximum and then hassle them about it. If you're capable of building it yourself then you obviously wouldn't do this sort of thing.