Semiconductor company SK Hynix has announced the release of 8 GB LPDDR4X DRAM, made possible through high-density 16Gb chips. The DRAM is 30% smaller and 20% more power efficient than current LPDDR4.
http://www.notebookcheck.net/SK-Hynix-announces-8GB-LPDDR4X-DRAM-for-phones.190755.0.html