I edit clips with Sony Vegas 10. And there HD clips, so in sony vegas, I have it down to preview, and it still lags really hard. I have 2 gb ram, and idk why it always lags. And when I render a 5 minute clip, takes about 5 1/2 hours.. Idk what to do to decrease the lag, or the Render lag. Also I delete all my processes when I edit. So it still does it. Not so sure why. Please help