[Hendriyo Kustrianjaya]

1. When playing back HD footage in the source or timeline it lags badly! I have tried all sorts to fix this but think it is my graphics card.

– I just edited some (frm canon 7D) HD 720p footage with 50fps using premiere 2.0, it looks smooth when I play/cut the footage. I just wonder to see that your high end spec computer. I am using core 2 duo with 2 Gb ram and standar GPU. Make sure ur antivirus is not scanning. If still lagging, convert it to targa files (but it takes alot of hardisk space) then you try to edit your files. the lastone is, you have to make sure you are using latest quicktime. alright, gudluck..