Question Memorey usage

Mar 7, 2019
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hey ., i have a high end pc
gtx 1080 8gb
8gb ram 2400hz
250ssd 2tb hdd
i7-8700 cpu 3.2ghz
but my memorey uasge shows on task manager is above 50% without opening anything . literally the highest program opened show less than 300mb usage any ideas?
 

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