I upgraded to a 1070 the 780 is old news - I've made multiple posts recently on the subject that usually conclude with something like (directly quoted from another post I made) "However it gets a bit more murky again if you throw some of the most recent games into the equation where the AMD 290s retain strong performance.", etc. so I have no idea where you are coming up with that idea. I've even posted twice in the last hour that I wouldn't recommend a 780 over a 290. Doesn't change the fact that if you are looking to get decent results out of increasingly newer games you aren't going to be talking about either of those cards.
Because in the new games an R9 290/R9 290X will increasingly thrash a GTX780??
Most of the newer games will run fine on a RX470/RX480 4GB/8GB or a GTX1060 6GB. An aftermaket R9 290/R9 290X is not massively different or massively slower.
What do you think an R9 390/390X is?? Its a faster R9 290/290X with more VRAM and slightly higher clocked VRAM.
Those R9 290 series cards will be fine for the next year or a bit longer. The sub £300 range is not really massively faster.
Until we hit a bigger performance bump under £300,most devs will target GTX970 or R9 290 level performance anyway.
The GTX780 lacks Vulkan performance,has worse DX12 performance and lacks VRAM.
You cannot equate the two cards together anymore.
If you had a GTX780 you will have more need to upgrade anyway. So that is what another 18 months to two years to an R9 290 then??
People are laughing all the way to the bank,because for an average gamer the R9 290 series cards have had a very long lifespan.
Plus having the same GCN gen as both the consoles,and the PS4 PRO being the same basic uarch anyway,that means lots of games will be developed for GCN1.1/GCN1.2 anyway.
Plus if people did a bit of mining on the side,they probably would have paid off the card now anyway.
AMD might have made some utterly disappointing cards,but the R9 290 series have proved their worth. Not even Fiji could really do enough!
If AMD had not done another subpar launch,the cards would have been considered in another way. They have themselves to blame for that one.
Like I said if Vega is not polished like the GTX1080 FE I am borrowing for a while,it does not matter even if it were GTX1080 speed for under £400.
Nvidia do polished launches and AMD has forgotten in some ways how to do that and leaves Nvidia chances.