the card as it is capable of using all the available VRAM. i don't know why some people make it that the card cannot access the final 0.5GB VRAM at all. the truth was about performance impact when the game exceed that 3.5GB mark. actually there is no fix to be released. the design of memory segmentation on GTX970 was nvidia own decision. so the drivers that made for the card was tweaked specifically to how the card being designed from day one.