I was thinking the AMD accelerated dual-core would be faster but I just didn't know. I appreciate everyone's responses. They're really helping me in an area where I'm completely lost. The unit I'm look at is an HP AMD dual-core E-300 1.30 Ghz, 4 GB RAM, 500 GB HD. My current system is Pentium 4 2.40 Ghz, 2 GB RAM, 40 GB HD.