Hi Everyone I have recently purchased a Mac Pro 8 core 2.8Ghz with 10GB of RAM. My media drive is 3 1TB Hitachi hard drives in raid 0. With all that power under the hood FCP dose not play video back as nice as it should. out of 5 times I click play I might get one playback that will play smooth all the way. But at times its a little jaggy and it gets worse and worse. The time line only has 30 seconds of 720p video on it. I have it set to the codec so there is no rendering needed. I even tried different options and rendered the video and still no go. Any thoughts on why this is happening? btw this also happens with DV video.