The issue with the 970 is it says 4 gig of ram however 3.5 is actually all that is available and the last .5 gig is like a cache. Driver updates have made it work better but there is a 3% (depending on who you ask and what you read) performance penalty when that last .5 gig of ram is accessed. All this talk how NVIDIA lied is hyperbole and blown way out of proportion. The benchmarks do not change it runs fast and generates very little heat compared to older cards. Every video card review on a 970 shows they run very fast and can be overclocked they can actually reach the stock performance of a 980.
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It is just if NVDIA called the card 3.5 gig of video ram with a .5 gig cache the nonsense would all die down. As it is some feel cheated by thinking (and rightfully so), that newer games will want to use that last .5 gig of ram and the card will suffer. However if your buying any card and assuming it will be perfect on new games not made or released your buying foolishly. No one will know what any card will do in games not made. You buy a card today that will play the games you do today at the best frame rate, with the visual settings you want to max out at. To try to think it is future proof the odds are good for games released within 6 months to a year after you buy it, it will do good, after that all bets are off. That I know is pure guess work but then again people would guess the 980 would not have an issue with the games the 970 may and no one can say that with certainty.
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As you guessed I owe a 970 and it works great, no issues and I max Elite and use the DSR feature so the game runs at 2715x1525 the monitor is a 27 inch 1920x1080 display so it knocks it back down but gives a sharper image using the feature. No card is perfect, but for the price and performance I found the 970 to hit the sweet spot for me. Your mileage may vary of course, just some blow things out of proportion. The card performs exactly as all the reviews sites said on games they tested. Is it a 4 gig card, yes, a true 4 gig not really, it is a 3.5 gig card. Way more then my old GTX580 at 1.5 gig.
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Calebe