Well you really only think about purchasing a Flex for EyeFinity, so I see that as the only focus for this, versus the GTX670 and where the real contention lies. If playing at 5760x you give it to the GTX670; although it fall under the old adage you "pay to play". Secondly it's even more dependent on what you hope to play, because it varies wildly between the two or unplayable with either. Multi panel set-ups are still fairly finicky (nowhere mainstream), when approached by either side. So it's an squabble of semantics.
When just testing as any general graphics review in the price segment of $290 there's nothing close (well except 7850). Not even the price cuts of older GTX570, especially in terms of frame latencies, and 99th percentile frame production, there's nothing competitive from Nvidia and doesn't appear to be for probably another month . The GTX670 is sweet, but when it is 25% higher in price though it's not near 25% at 1920x in title's that really press these cards (BF3 is the exception) it not a great value. If playing at 2650x a $300 card isn't the price point such folks should be buying... move to the GTX670. Playing on a 1920x and need a capable card that's easier on the wallet, skip the Flex and get any 7870 that currently can go for $270-290 –AR.
