Sounds like the CPU is clocking down.

by R. Proffitt Moderator - 12/12/12 7:34 AM

In Reply to: Real time mouse/keyboard recording by MarlboroMan2112

One of the neat tricks of today's CPUs is to throttle back when needed. This is my guess. Too bad the make and model was omitted. But any i3, i5, i7 does this.
Bob