Actually an standard gtx 680 is around 7% faster than a 670 OC edition , which was actuallu the 1st 670 that came out to the open. Most people think that a normal gtx 670 is only a little bit behind a 680, but the true is that for that you need to overclock your 670 or get a OCed version, just to match (nearly) the performance of a 680, since after all the 670 is a lesser product. However since he is talking about one of th best 680's in the market while OCed to 1400mhz it will easily beat an OC version of the 670. If it wasn't because I bought a reference 680 when their were launched I'd buy a lightning for my sli, but that would mean losing the extra boost. I recommend 100% the 680, regards.
Actually an standard gtx 680 is around 7% faster than a 670 OC edition , which was actuallu the 1st 670 that came out to the open. Most people think that a normal gtx 670 is only a little bit behind a 680, but the true is that for that you need to overclock your 670 or get a OCed version, just to match (nearly) the performance of a 680, since after all the 670 is a lesser product.
And you try to justify the 30% higher price tag on 680 with that? Fail.
30%? Where? The pricing difference is barely 15%, and everything I just mentioned is true, people made a big deal out of that but at the end we have a overclocked product compared to a reference one. He is asking which card is better, not which one is a better bang for the buck
two 660 in sli is also a very interesting option because it out performs a single 680 easily while costing $600. I suggest you get a single 660 now and another one when you feel like it a few months down the line.
Cheapest 670 on newegg is 400 USD and the most expensive - 500 USD
Cheapest 680 on newegg is 500 USD and the most expensive - 660 USD
So the price difference is from 25% to 32%.
Unless you are comparing mid range 670 to low range 680 - but that is just stupid.
If you want a fair comparison, look at i.e.:
Gigabyte 670 vs Gigabyte 680 with similar cooling
400 vs 500 - 25%
Asus 670 vs Asus 680 with similar cooling
420 vs 530 - 26%
That's very interesting , and I wonder if you checked the MSI twin frozr , here is below 500 US and believe me in my country things arrive more expensive. Anyway even though been a price tag difference around 20% or maybe a bit higher, still as I told you the guy didn't ask which card would be cheaper , actually all he asked is which one is better. I know most of the time we give advice about the best performance - budget friendly product because I always do the same with AMD (yeah Intel is hella expensive, sorry) but we need to understand there are some people that just don't care if they have to pay more for what they want, and I think this is the case.
My final advise:
If you are looking for a card with a decent price tag and awesome performance, yeah any 670 OC either gigabyte , msi or any other brand will siut you perfectly. But if you don't mind paying a little bit more , the MSI lightning edition of the 680 might be (along with asus directcu2 and gigabyte SOC) the best nvidia single gpu product out there. It will of course overclock higher than a 670 and the extra shader does count on multi monitor and high resolutions. Regards and good luck buying!