So i just built my first PC. Yet to add a GPU since the one i want is out of stock. I was playing some games and i noticed 90% of RAM usage. I'm guessing it's because of the textures. Also pc slowed down during installation of some big games. As of now my pc has one Corsair 8GB 3000Mhz RAM stick. I have a couple of 4GB 2400Mhz RAM sticks lying around from my nephew's dead pc. Is it worth it to add them to my system and run at 2400Mhz all sticks for now or i would be better off with the one 3000Mhz stick?
CPU : i7 8700
Mobo : MSI Z370 A-PRO
RAM : Corsair 8GB 3000Mhz
Monitor : Acer KG241Q P 144HZ
Storage : 2 X 240GB SDD, 1TB WD blue
PSU : Corsair 550w
Cabinet : Corsair Spec 01
CPU : i7 8700
Mobo : MSI Z370 A-PRO
RAM : Corsair 8GB 3000Mhz
Monitor : Acer KG241Q P 144HZ
Storage : 2 X 240GB SDD, 1TB WD blue
PSU : Corsair 550w
Cabinet : Corsair Spec 01