Yup, you are doing it wrong. Enthusiasts on our forum overclock cards. An overclocked 7970 mopped the floor with an 860mhz 580. Even if you took a 950mhz 580, it would be 40-50% behind an overclocked 7970. Your 20% advantage you keep repeating for the least 2.5 years is stock vs. stock.
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It depends what position you are looking at. If someone makes $1 million a month and GTX780 costs $20,000 USD, it's still dirt cheap for them. If someone makes $1000 a month and GTX780 is $650 but gaming is their primary hobby, maybe they can justify it still. When we compare cards and say one card is overpriced, the statement is strictly in FPS/$ terms in the GPU stack. It's obvious that if gaming is someone's primary hobby or if they make a lot of $ where spending $650 vs. $350 makes no difference to them, then to them GTX780 is awesome value. Strictly on a price/performance curve, 770/780 are overpriced relative to other GPU offerings, for instance 1Ghz 7970.
That's straight up from the Apple handbook. You are using the price of one overpriced product as justification for another overpriced product. Just because GTX780 is $350 less than the Titan doesn't somehow give it a pass for good value.
http://www.computerbase.de/artikel/grafikkarten/2013/nvidia-geforce-gtx-780-im-test/14/
Using your logic if NV tomorrow released a 2880 cores GK110 and priced it at $2,000, then the Titan would suddenly become good value too? Doesn't work that way.
That's why for me 780/Titan are stop-gap cards that don't make much sense at $650-1000. They can't provide the needed boost in demanding games like C3 and yet by the time we get a lot of PS4/XB1 console ports, we'll have Maxwell at least. Once next gen PC ports come out, I'll want a card at least 75-100% faster than HD7970 OC. GTX780 won't cut the mustard. It's the same story with 8800GTX vs. 3870. Sure 8800GTX stomped it but in the context of next gen PS3/XB360 PC ports, we just upgraded to keep up with future PS3/360 ports.
Not me. I'd rather buy a $550 mid-range card that pays for itself and makes $ many times over its price in the 1.5 years it took the $650 card to come out.