When it comes to power usage and price, I've already said this:
If I understand your right, you are arguing that the current architecture of GTX 480M means nVidia is having problems with yield. You also bring inn the "castrated" chips and manufacturing costs on top of this. and trying to say manufacturing costs, yield, is the reason for high prices, and other bad stuff. But you are wrong, because the competition (ATi's ability to counter the Fermi) has the biggest effect on prices, would anybody with a couple of days marking-classes tell you.
I don't know if your assumptions about yield is right or wrong, but even so, why should I, as a consumer care about it? Why should I care about 480 out of 512 at all?
I don't care how much it costs to manufacture, or what kind of problems nVidia may had/have, what they could or should make. All I as a consumer care about is the PPP (Performance, Power usage, price) of the current products on hand.
The performance is the most important and comes first. There is no doubt that GTX 480 is performing good enough above the competing GPU (5870).
The price is more up to ATi's ability to get it's acts together and compete, and in case Fermi-prices will fall fast, for sure.
The high power usage is still a problem, and it may have something to do with GPGPU-extras, but it may get better by maturing BIOS, drivers, and such by time. Hopefully will get better, and it should, anyways.
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