Here are our recommendations for this issue:
- Make sure you have the latest drivers and BIOS update for the motherboard.
- Make sure to have the latest firmware update for the TV tuner card you are using.
- Test the system outside the chassis to ensure grounding is not affecting the system.
- Increase the RAM memory on your system.
Turn off Aero, it helps immensely with this chipset, especially in regards to video playback.
Here is a third party solution for smooth streaming of 1080 HD video that an Asus 1025ce owner (GMA 3650 and Atom N2800 cpu) says works well. He recommends the solution below in a review of the 1025ce at http://www.tlbhd.com/asus-1025ce-review-13372
To enable DXVA for smooth 1080HD play: http://www.tlbhd.com/how-to-enable-dxva-on-the-asus-1015b-for-1080p-mkv-h-264-files-9345