I've just installed Windows 8 and everything seemed to be running fine plus I now have sound. Happy that everything was setup I decided to try some games. Alas, they all seem to be suffering from very low GPU usage such that games like Crysis 2 and Guild Wars 2 on maxed out settings at 1920x1200 never heat my GPUs up above 50 C and the GPU usage never exceeds 50% and often is at 10-25%. Demanding games are running at 15-25 fps and less demanding ones, which handled 60 fps with ease, are dipping to 40-50 fps. I even ran the Heaven Benchmark v3.0 and that was stuttering at 17-20 fps on maxed out settings whereas it is usually smoother and running at over double that framerate at least! Any suggestions? Everything ran fine on Windows 7. I've reinstalled DirectX. I tried installing the Intel Chipset drivers v9.20.1030 but they stalled during the extraction so I presume they're not compatible with Windows 8. I'm using the v306.97 WHQL drivers that were installed by Windows Update. When I ran a 3D program called Real-Time HDR Image-Based Lighting on the desktop though with CPU-Z and GPU-Z open it was running at hundreds of frames per second, the CPU was at 3.8 GHz and the GPU was hitting 83% so there doesn't seem to be anything amiss there. That's a windowed demo though and the games are running fulscreen. I'm very puzzled by this and hope that someone can help me.