1080 with 40 fps

Jan 16, 2019
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so I bought a 1080 mini graphics card and I have i5 6600, 8gb of ddr4 ram and for some reason, I'm running games on very low fps, for example, I'm running fortnite on 70-100 fps and rainbow six on the highest setting on 30-50 fps no idea why is this happening please help and thank you.
 
Jan 16, 2019
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well my CPU is at about 45-50c and my GPU is at 40c
btw is it possible that I have a bottleneck?
 
Jan 16, 2019
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os so gpu temp is 39-52
core clock is 1114-1898
cpu temp is 33-59
and thank you for your help