ram cached drive

My computer runs fine until I enter a game I here 3 bibs don't know what it is? And when iam in game my cached ram keeps going up? I get that's the point of caching it but when my game needs it it won't give it back and I have to restart the game... If you didn't understand anything of this I...

is my build good? what is compatible? this is my gaming desktop specs... Windows 10 Intel Core i5-8400 Nvidia GTX 1060-3GB IHMA81GU6AFR8N-UH 1x8GB intel Optane+931GBHDD 1TB MBD Dell isnspiron 5680 Im looking to increase my ram, add more memory and also a big concern of mine is...