spellbinder2050 :
Does anyone know if this is possible given the situation with the GTX 970's memory controller? I'm already seeing games that are using more than 3.5GB of Vram, Dying Light for example. I would like to be using the card's memory capacity at full speed. =[
In the end, what really matters is real world performance. Maybe that memory structure will require nvidia to be a little more creative with their drivers, but the hard fact is that we don't really see a significant setback with the 970, and that is what counts in the end of the day.
As for games "using" more than XXGB of VRAM, we seem to circle back to this subject every now and then. Keep in mind that memory allocation is entirely different from memory usage. The video driver will always try to allocate and pre-load everything it can, because it can and why shouldn't it? That does not mean the extra VRAM is actually achieving a performance advantage. As long as the available buffer is enough for anything the game engine demands at one time, there is no performance disadvantage. This was a big topic of discussion based on the Titan card's 6GB buffer and claims that it was needed for X, Y or Z game. In the end benchmarks show it is not. 3.5GB on the other hand is a lot more down to earth, and it is possible that some scenarios would benefit from that extra 512, so this might be one of the reasons the card starts to lag behind its peers in higher resolutions (think 4k).
Finally, my advice is to use real world data, and also never compare benchmarks from different test sets. Personally, I have one 970 SC and still don't think the 980 is worth the extra cost. In fact, I'm contemplating a second one for SLI to run a 21:9 UWQHD monitor.
Edit: just to further the point, the recommended hardware for Dying Light states a 2GB VRAM video card.