over clocking ram

CPU: intel I5 - 9600k
Motherboard: B360 AORUS GAMING 3 wifi
Ram: DDR4 16gb (8x2) 3000 Mhz but only set to 2133 Mhz max it can go is 2666Mhz
SSD/HDD: Seagate SATA-III (6gb/s) 7200rpm 2Tb
GPU: NVIDIA GeForce GTX 1060 6GB
PSU: EVGA 750 GQ, 80+ GOLD 750W, Semi Modular
Chassis: I don't know
OS: Windows 10
I use the system to play games mainly rainbow 6 siege, gta v, rust.