Radalat, Unfortunately I'm not a hardware person so I couldn't tell you what the chipset and buss specs are (is there a properties dialog box that might tell me this?) You're right about the gain in performance being negligible as well, especially given that some of the time difference can be attributed to improved render times in Vue Pro (which is the one on the pentium 4). Unfortunately I can't load esprit on the p4 or pro on the athlon as one is my personal computer (the ahtlon) and the other is my work computer (the p4).