VST Performance is crazy even before load any project

This only happen to me in C8, not in C7.

  1. Open Cubase Pro 8.
  2. Press F12 to view VST performance window
  3. The “real time peak” and “load” are stutter between 5% - 20%

Have no sense at all. This not happened in Cubase 7.

OS: Win 8.1 64 bit. i7.

And at any buffer size.