Some odd reasoning here. GE is in essence nothing but an overclocked 7970 so going after the bang/buck theory everybody should by a reference 7970 or a preoverclocked card at less and have fun. I really don't see any business reasons why the card was launched but only marketing. It is faster than the 680 because it's overclocked. What now, NV should launch the 1150 MHZ 680 edition and reclaim the top spot? But let's say here you have a point.
I agree that HD7970 is better value but so is 670 vs. the 680, so not sure what the point of that is.
Right now GE still costs $50 less than a stock 680 and way less than just about any factory preoverclocked 680.
Gigabyte Windforce 3x Factory overclocked 680 for
$525
vs.
Sapphire Vapor-X HD7970 GE 1.05ghz for $450.
NV is charging $75 more for what exactly?
GE is an official SKU. It's no different calling it overclocked than other such cards in the past:
1) 9800Pro vs. 9800XT
1) X800XT vs. X800XT Platinum Edition (PE)
3) X850XT vs. X850XT Platinum Edition
4) FX5900 Ultra vs. FX5950U
In fact, using your logic, GeForce 4 Ti 4600 is an overclocked GeForce 4 Ti 4200. All of the above SKUs are identical cards with only clock speeds separating them.
The GE is a refresh of the 7970. Maybe AMD should have called it HD7980 or HD7970 Platinum Edition. The marketing is confusing that's for sure.
However, not sure why you keep ignore GE. Sure, you can buy factory pre-overclocked 680s but I don't see many of those for $500. At the current price level a $500 GTX680 trails the GE in benchmarks. If you take OCed vs. OCed performance,
HD7970 once again beats an overclocked 680 for overall performance crown.
Stock vs. stock or overclocked vs. overclocked, HD7970 GE has that slight edge now that's enough to call it the fastest single-GPU.
It's funny that this time around the roles seem reversed. AMD has the higher performance on average but with significantly higher power consumption - just as Nvidia did before.
I wouldn't say
35-45W is a significant power consumption difference, especially not when talking about a system that even with a GTX670 already uses > 300W.
Here you go, 1200mhz HD7970 vs. GTX680, still below a stock GTX580:
Skyrim is only not demanding if you don't know what SSAA is. It looks great in Skyrim and then Kepler really pulls away.
Do you have a link with SSAA in SKYIM for GTX680 vs. 7970/GE?
Here I found a bunch of games with SSAA and the performance is very similar, outside of Bulletstorm where 680 loses badly:
http://www.computerbase.de/artikel/grafikkarten/2012/test-amd-radeon-hd-7970-ghz-edition/6/
Here is Trine 2 with SSAA, 680 loses:
http://www.computerbase.de/artikel/grafikkarten/2012/bericht-nvidia-geforce-gtx-680/10/
7970 also pulls away in high-AA modes (a bunch of games tested):
http://www.computerbase.de/artikel/grafikkarten/2012/bericht-nvidia-geforce-gtx-680/5/
Also, the recently popular Arma II Day Z mod - GTX680 doesn't stand a chance:
http://www.bit-tech.net/hardware/2012/06/22/amd-radeon-7970-3gb-ghz-edition-review/3
Like I said with the latest drivers, HD7970 GE has really come out swinging. The tables have turned completely with the 680 trailing in most games now. Frostbite 2.0 games is about the only area left where Kepler is really strong. When GTX680 came out, it was clearly the faster card. It's unbelievable how much ground AMD's driver team has made up in 3 months.