Every benchmark I find shows the 1060 3gb beating the rx 480. These tests were geared toward the 470 but you can see the 480 was also beaten by the little guy. Yes it does trade some blows but when u take into consideration power draw and size it seems to be a no brainer.
http://www.babeltechreviews.com/evga-gtx-1060-3gb-vs-red-devil-rx-470/
Sent from my VS985 4G using Tapatalk
Some of us remember the 8800GT 256MB,8800GTS 320MB,etc and similar cards. The VRAM limited cards looked good at the beginning and started getting worse and worse. The 8800GT 256MB lost performance so bad,a 9600GT(same generation of GPU) with nearly half the shaders beat it since it had more VRAM.
Plus,Digital Foundry and Guru3D,noted that the 3GB card in certain situations with newer games had performance issues and stutters too.
That is in the Rise of the Tombraider and Hitman 2016. Deus Ex:Mankind Revolution is also VRAM heavy. Its part of a continuing trend.
Most review sites are not here to make estimations of how long cards will last - but even then The Digital Foundry and Guru3D said to spend the extra and get the GTX1060 6GB.
A while back people said the GTX960 2GB and R9 380 2GB cards were fine and 4GB versions were pointless. Yet late last year,one of the big german websites tested the 4GB versions,and frametimes were much better.
You need to also think about this - on Steam 3GB cards are rare - its either 1GB,2GB or 4GB cards. Those 4GB cards are most likely the GTX970 and GTX980. Hence more and more developers will be targetting that level of performance and more than 3GB of VRAM and AMD and Nvidia want to sell more expensive cards. There is a lot for them to gain from increasing VRAM usage.
Now,look at the Founders Edition PCB - its wired for a 256 bit memory controller. That either means the GP106 has a 256 bit memory controller and the refresh of the GTX1060 will have 4GB of VRAM in its cheapest version,or Nvidia will use a cut down GP104 instead.
Don't believe me?? Nvidia replaced the GTX660 with its GK106 GPU with one from the GTX680,ie,GK104 in a cut down form with the GTX760.
The GTX1050 leak says its a 4GB card too.
Edit to post.
Digital Foundry is more a gaming orientated website and they said the following:
In the here and now, the three gig GTX 1060 is a good card with excellent performance at its £189/$199 price-point, but its VRAM allocation may well hit its limits more quickly than the four gigs found in the RX 470/480. None of the new wave of sub-£200/$200 graphics cards should be entirely ruled out, and this pared back GTX 1060 still packs plenty of punch - but investing just a little extra in the GTX 1060 6GB would be our recommendation. With
certain six gig versions retailing under the initial suggested price-point, grabbing the more capable model needn't break the bank.
It makes sense if you are keeping the card for the next two to three years.