R9 390 or gtx 970 ?
The first thing and the main difference is that the 970 is 3.5GB and the 390 is 8GB
although the 3.5 gb is enough for 1080p games for now but on 4k there are about 3-4 games showing signs that they need more than 3.5 Gb ram in those cases the 390 would excel with its 8 gigabytes of ram and maybe on 1080p games start using more ram soon ? in this case390 wins
The second is the power consumption:
So you see the difference ? the 390 uses a 100 more watts then the 970 the 970 is proven more efficient in this cases i would really like to see things use less power so i might choose the 970 for this reason.
Now the performance:
So if power consumption is not your concern there is no reason not to choose the 390, Here get the MSi version its the best one compared to other ones out there
Amazon link:
http://www.amazon.com/dp/B00ZGF0UAE/?tag=pcpapi-20
Hope i helped and happy gaming