NVIDIA's GeForce GTX 690 currently wears the world's-fastest-graphics crown by cramming two Kepler GPUs onto one board. When it comes to improving on that, some leaked European retailer listings suggest NVIDIA might not wait on a completely next-gen architecture, but may instead try to deliver similar performance through a less power-hungry single GPU design. The listings, gathered together by TechPowerUp and VideoCardz,point towards a pricey new flagship, the GeForce GTX Titan, that would be a graphics-focused adaptation of the beefy Tesla K20 computing card. It'd pack 2,688 shader units, a 384-bit memory bus and 6GB of RAM, all on one chip -- for reference, the GTX 690 needs two cores to offer 3,072 shader units and has 4GB of RAM. There's no confirmed unveiling date, and the primary leak on a Danish site has actually been pulled, but ASUS and EVGA are rumored to be launching their own GTX Titan variants as soon as next week, possibly in the $1,000 to $1,200 ball park. That's a short wait for what could deliver a serious boost to game performance, not to mention bragging rights.