Originally Posted by lduguay
For one i'd expect less heat from the 55nm part when clocked equally.
Could also offer more overclocking headroom.
Which is why most people won't notice.
It makes sense for them to do this. They're switching to 55nm to decrease their own costs, not to make the chips sell better.
They'll probably leave it to the card makers to sell super-duper-clocked versions of the new 55nm GPUs.