Hello there, I've recently bought a Dell Precicion PWS670 3Ghz Xeon, 2GB RAM. Nvidia Quadro FX1400. Everything is configured as in the Avid document on this machine. Running XPPRO 5.2 with MOJO. However I do have playback problems. On a simple playback of a DV420 PAL master clip the video and audio studders ever so often (once every 20 seconds). This