Question New graphic card, but low scores

Feb 27, 2019
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Hello!
First of all I'm sorry if I make any mistake, but English is not my main language :x
So few days ago I decided to buy used graphic card - GeForce GTX 1080Ti. Everything would be fine, but I have lower fps than people with worse components. Like guy with same graphic card and worse CPU has better score in FurMark than me. And it's not like 10 or 20 fps, but over ~80! I don't know what to do. I can't return it :c
Here is img of my score: View: https://imgur.com/a/zfOsY7O

and guy with I7-6700 has ~245 fps. What should I do? :(
@EDIT: here is benchmark from 3DMark: https://www.3dmark.com/3dm/34035357?
 
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