Wait until June 24. There will be a new player in the 4K field.
AMD will be releasing a new flagship video card much like Nvidia has the Titan, well the rumors now are that the AMD card will be called the Radeon Fury. It will be the first product in the world to use a new memory technology that AMD designed, and then turned over to JEDEC the memory standards people. This memory is stacked, just like pancakes, but the magic is that it sits on a piece of silicon that the GPU is also on. Each stand of this memory is 1GB of memory, and has an incredible 1024 bit wide bus. Now most high end video cards have a memory bus that is 384 bits wide, and a few have a 512 bit bus. But this new video card from AMD is going to have 4 of those memory...