To those saying how informed buyers will KNOW the 6870 is slower than their 5870, you are being very short sighted. This isn't about the <1% (ppl on XS) that build their own systems, this is about the mainstream. BestBuy and jabroni stores like it will have desktops with 6870's, and laptops will start carrying 6870M and random Joe's will buy it, see the 6870, see another product with a 5850 or 5870 and immediately think "mine is faster". If you don't comprehend this type of thinking, you must live alone in a cave. ANY NORMAL, NON-TECHNICAL PERSON ASSUMES A BIGGER NUMBER MEANS FASTER.