I dont really know much about UG yet, but my computer is running, 3Ghz Pentium 4 800FSB HT, 4.5 GB of fast memory, and a 128 ASUS NVIDIA Graphics card, and UG run's perfectly. I have had it crash once though, but only once. My machine is mainly set up for CFD as i do ALOT of that. You probably wont need as near enough memory for UG.