Apparently, it's been announced that a much more powerful graphics card is coming soon based on Maxwell, the GTX 880, with 3,200 Maxwell cores (since 1 maxwell core is 1.35 times a kepler core, that would be 2 kepler cores, so it's essentially a GTX 780 Ti SLI) but it's memory bandwidth is only 238GB/s per card, meaning I would need at least 3 cards in SLI to get fast graphics performance. Should I wait for it or buy the 780 Tis SLI now?