Some strange problems with ram usage

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I don't use scaling,linear filtering or anything that enhances the graphics(when I try something neweI automatically assume that any enhancement are too much for my pc so I turn everything that enhances the graphics off)

I tried deleting the settings many times because while I was trying to figure out what's wrong,sometimes the problem(high ram usage)was triggered even by just starting the emulator(no game loaded)

I also tried different version which didn't had any settings.
I tried just now one more time just to be sure(deleted the settings and tried a game without changing anything)but again,black screen if BR is enabled(it's acting exactly like this hide the game behind black screen\remove the black screen)
Also if HT is enabled....black screen,then it uses all of my remaining ram and continues with the page file.

With HT disabled,no black screens and no high ram usage

BTW in the settings(by default)...Settings=>Graphics=>Next Page=>there is Anisotropic Filter.
Is this enabled or?
It says Level 8x and I always disable the Anisotropic Filter