Aggron :
UncreativeName :
I have to agree in terms of pairing two cards then nvidia all the way but as a single card in terms of performance generally the 390 seems to perform better except in nvidia optimized titles such as witcher 3. Saying that the 970 overclocks well so you could see big fps gains there.
For OP you could watch this comparison to see which GPU suits you better:
https://m.youtube.com/watch?v=udXCusTnRsY
Do you know how far you can upgrade the r9 390, cause I'm leaning towards it atm. If overclocking the 970 can make it faster than a 390, than I will go with a 970.
The R9 390 is generally stronger stock for stock so the slightly better overclocking isn't as big of a deal. The bottom line is that the 970 is a more efficient card and runs cooler, but that's not to say the R9 390 runs 'hot'. Both cards have aftermarket non reference boards that improve noise and temperatures and the cards performance is so similar that once it is in the case you'll barely notice a difference. I would say at 1440p though in a SINGLE card setup the 390 is the better card with its more stream processors and 8gb vram. The way I would decide is either toss a coin, buy the one I prefer or which ever is cheapest. My money would be on the 390 at this point. Look at some reviews or wait for some moe video reviews to arrive if you can't decide. Or another deciding factor would be if you definitely plane to SLI/Crossfire because in that case go Nvidia all day, SLI has much less issues.