I have a quick question for anyone that can help. I just got a new 3870 delivered to my house today. Before I had an HD 2900XT. Now usually I do a clean install when I add new hardware but its been so long I don't feel like reinstalling everything. My question is this. If I remove the old 2900 drivers and do a clean install of the HD3870 drivers on my current OS "Vista" do you think it will cause any conflict and or performance hit?