Both. But i did some recording with E8400 and 4GB DDR2 RAM's. There is no lag. You may face an initial stutter when the actual recording starts but after that nothing. As i said uncompressed videos take up very little of the resources, so that should not be a problem. But HDD space should be big. The partition on which the video should have at least 30GB of space. Coz the files are humungous when created! You can 1 minute = 1GB almost.