G.SKILL today announced new high-performance memory kits available in 32 GB (4 x 8 GB) and 64 GB (8 x 8 GB) configurations. There are two kits: one is clocked at 4300 Mhz, while the other is clocked at 4000 MHz. Both variants offer relatively low CAS latency, considering their sizes and speeds. The kits will be available in the 4th quarter of this year.
https://www.notebookcheck.net/G-SKILL-announces-new-Trident-Z-Royal-DDR4-RAM-kits-clocked-at-up-to-4300-MHz.434384.0.html