Unless you plan to game using either a surround monitor setup or a 4K monitor, 2GB DDR5 should be fine for now. However, several game developers have announced that future games will use more and more VRAM for buffering during gameplay. CoD Advanced Warfighter is one such game that can use up to 4GB of DDR5. My advice is to buy the most powerful card with the most amount of DDR VRAM that you can afford. For most, the GTX970 is the sweet spot, even with the 3.5GB VRAM issue, it's still the best bang for the buck, runs cooler and uses the least amount of power compared to anything within its price range.