Please post what your CPU model is
Try these:
1) Update drivers, Windows updates, DirectX Web updater (some components may be missing), and latest version of Visual C++
2) Make sure under Power Management in Windows you're running in High Performance, and are plugged in to power
3) Use the OpenGL backend on one of the latest dev builds, as it is faster than D3D. The current dev build is 4.0-706
Try these:
1) Update drivers, Windows updates, DirectX Web updater (some components may be missing), and latest version of Visual C++
2) Make sure under Power Management in Windows you're running in High Performance, and are plugged in to power
3) Use the OpenGL backend on one of the latest dev builds, as it is faster than D3D. The current dev build is 4.0-706