It looks like the ATI 5670 is an older model. I am going to either go with 6570 or 6670. The 6670 draws more power than 6570 under load but it is apparently more cooler. So I am leaning towards 6670. The price of Sapphire brand (1 GB DDR3) is same on Amazon. Fyi, the PSU on my computer is 360W. I suppose, it if supported 4670 for three years then it will be fine with either 6570 or 6670.