Quote Originally Posted by Xello View Post
Where are y'all getting the hard facts on the 4870 / 4870X2 from? Is this shared memory rumor still going around I'd like to know the 'multiple' reasons that the X2 will end up faster than 2 4870's in CF, all reasonable expectation and past experience (3870X2) says the opposite.
There are no facts on this, these are just some remnants of what R700 was supposed to be. R700 was supposed to be a single chip that would fill in the low-end, mainstream and high-end market all at the same time. This would be done by just putting more of these chips on the same board, 1 chip would be for low-end, 2 chips for mainstream, 3 for performance and 4 for enthusiast. These were the plans for R700, at least the way ATI said it would be for R700, but this was about 3 years ago if not longer. This R700 has been scrapped, it might turn up later no-one knows, but you need these chips to cooperate properly and this will basically mean there will be shared memory (and more, more like each chip being a ring stop on the ring bus). The rumours of RV770X2 having shared memory stem from these early indications of what R700 was going to be and there are still hopes of this being true. Only AMD know though....