Micron's Hybrid Memory Cube - HMC modules have demonstrated speeds 10 times higher than current DDR3 memory modules where DDR3-1600 is capable of data speeds up to 12.8 gigabyte per second and promises up to 20 faster.
While not ready for consumer release Micron claims to be able to offer 20 times higher bandwidth as DDR3 and do it with only 10% of the energy needed to power modern modules.