Hard to break 8GB? Maybe in winxp era. Now we have browsers using one even two GB easy, even damn skype at 700MB.
Also if your running low on ram u have alot more disk read. Maybe even pagefile to avoid programcrashes.
Well hf with slow pc and this error if u wanna roll 8GB ram.
16GB has been mainstream and recommended for any gaming system since 2years~ and its not w/o reason.