Unfortunatly my motherboard will only support a processor up to maybe 450 which is not a noticeable difference. I was looking to upgrade my computer as best as possible without having to put a new motherboard in (that would basically be building a new system). I am going to get a new computer in the future but was looking to upgrade my computer so it is compatible with LW6 as much as possible. So that was why I was asking about video cards.Although someone emailed me from LW6 newsgroup and he told me he runs a Diamond Viper V550 with his lightscape and it runs fine except for a few glitches but that's mainly because he has win98se and not WinNT.