When you ran it last were your settings all the same? As far as I know nothing should have changed this.
I ran the benchmark about 6 times with varieties in renderer gpu and graphics quality. If i choose dx 12 there is a 3 to 4 gb increase from the start as opposed to dx 11 ( so 11 measures at a total of 5,5 gb's and dx 12 goes to 8,5/9 gigabytes of system ram use ) but this doesn't affect current cpu load at all wich remains high between 50 and 70% load which is really absurd!
In the beginning of this year i tested the game out to see how my new ryzen system would react and i'm fairly certain i was on the cpu load subject no where higher then around 30% cpu load and system ram measured between 10 and 12 gb's which was fine....
as you can see from the bench results it is not that i can not experience the game but this feels like such a drop back into the stone age... Playing like this totally opposes my envisioning of my new gaming life