Spike problems.

[X-Ray_Dog]

happens to me for some reason. Its not that you lag its that you have to many things open on your computer. Left click on the bottom and click show task manager and End some processes. It works for me every time.

The reason for this is some of your computer memory is used to help out your graphics alongside the dedicated video memory in the chipset itself. If your computer uses all of its memory up for applications, it starts to draw on the shared video memory putting all the work on your GPU instead of getting help from the computer.