JEMC said:
HoloDust said:
Well, 7970m (which is mobile, slightly downclocked version of HD 7870) is rated at 75W (though some sources state up to 100W). Now how they achieve that in mobile versions of their chips has always eluded me. But if that is correct number, CPU+GPU would give (95+75) TDP of 170W. Which I think would put it (when all other stuff is added) well within bounds of original Xbox360. But yeah, as you said, I wouldn't bet on 7970/680 equivalent inside any next-gen console.
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(Numbers taken from Anandtech)
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HD 7970 |
HD 7900M |
Stream Processors |
2048 |
1280 |
Texture Units |
128 |
80 |
ROPs |
32 |
32 |
Core Clock |
925MHz |
850MHz |
Memory Clock |
1.375GHz (5.5GHz effective) |
4.8GHz |
Memory Bus Width |
384-bit |
256-bit |
Memory |
3GB GDDR5 |
2GB GDDR5 |
As you see, the cards are not exactly the same.
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Forget GPUs with 384 bit paths instantly, even 256 bit paths is unlikely. Count the numbers of board layer any stable PC graphics card has - way too expensive for a console. As I have explained before, a (simplified) AMD7770 (which has a 128 bit bus) is cheap and more than powerful enough for 1080p/60Hz.