Against the GTX 980 Ti, a card that launched for $649 and just until recently was considered an ultra high end option the GTX 1080 actually looks like a viable upgrade path, particularly when overclocked. That’s something that could have never been said about the GTX 780 Ti to GTX 980 metric. Not only does it offer 35% higher (on average) framerates than NVIDIA's erstwhile flagship but it does so while consuming less power. While we couldn’t add it into these charts in time, the $999 TITAN X is about 3% faster than the GTX 980 Ti so it would still be beaten like a lazy donkey by NVIDIA’s latest 104-series core. Looking at these results, I can’t help but be anxious for what the GTX 1070 could potentially bring to the table for more budget-conscious gamers.
With all of this being taken into account the GTX 1080 is able to walk all over the R9 Fury X too, at least in DX11 situations. NVIDIA is obviously marching to the beat of a different drummer but don’t count AMD out of the fight just yet. By looking past the initial numbers versus the GTX 1080 we can see AMD’s driver team has been able to leverage their architecture’s strengths and the Fury X is now able to step ahead of NVIDIA’s GTX
http://www.hardwarecanucks.com/foru.../72619-nvidia-geforce-gtx-1080-review-25.html
Sure when you compare stock to stock on a reference card, but we still don't know how the other cards are going to perform. The only thing we know right now is that there is only a 12% increase in performance when both are clocked to their supposed max (until you get power-limited on the GTX 1080 - so unless the partners add another 6 pin and go well beyond the reference they are not going to perform any better).
It's just ignorant to assume that people are running reference cards at stock speeds, when most, if not all, are running custom cards with much higher clocks. Heck even reference cards have no problems reaching 1450mhz. So max OC vs max OC (or average OC for the GTX 980 Ti as I've seen a lot go higher than 1450).
As for the value of the cards themselves, it doesn't matter if the GTX 980 Ti cost more at launch, when it clearly offers much better perf per £ right now. As I said you get approx 12-15% increase in performance (if you're not running on a reference card at stock clocks), which is pretty good, but for 200£
*extra it's really not worth it (depends on the person of course). Considering the GTX 980, which the GTX 1080 is supposed to be replacing, cost only 429£
*at launch, the £ price-tag becomes even more absurd.
Custom cards are the ones that could make a difference, but as it stands right now, Pascal isn't offering a major advantage over the GTX 980 Ti, which is to be expected because it isn't a top of the line card like the GTX 980 Ti is, especially at the 619£
*price-point.