The new Trident Z DDR4 4333MHz memory modules are not listed on G.Skill's website but we suspect that these could be quite similar to the currently available Trident Z DDR4-4266 8GB kit, which works at CL19-26-26-46 at 1.40V. This is also the same kit that has broken a couple of world records by hitting rather impressive 4901MHz. 

According to ASRock, the Z170M OC Formula motherboard is currently the only motherboard that supports this kit out of the box, mostly due to its high-end design with 14+2-phase VRM and 10-layer PCB. The same motherboard was used in a couple of overclocking events and has been designed by famous overclocker Nick Shih.

Frank Hung, Marketing Manager at G.Skill said "G.SKILL Trident Z DDR4 4333MHz memory kit is specifically designed for extreme overclocking on the latest ASRock Z170M OC Formula motherboard and 6th Gen Intel Core Processors. Using only specially selected performance components, it is the speediest DDR4 memory kit on the market today that pushes the Z170 platform to its extreme limits."

We are quite sure that the same G.Skill Trident Z kit will work on some other high-end motherboards but for now ASRock gets the bragging rights. Unfortuantely, we have no details regarding the availability date or the price of that kit.