I had 8GB of DDR4-3000MHz Ram and I decided to buy two more of the identical sticks. Yesterday I was running at 3000MHz. I recieved the additional sticks today and I installed the other two sticks I can no longer run at 3000MHz. I tried putting the original two sticks back in and I can no longer get those to 3000Mhz.
CPU: Ryzen 5 2600
MOBO: Gigabyte B450 DS3H
RAM: T-Force Vulcan 16GB (4x4GB) 3000MHz