low fps gtx1080/i5 6600k

Jun 1, 2018
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Hi guys, before when i play DOOM run 120FPS on Ultra 1080p but after a update of win10 down to 30FPS and never over 90FPS. What can i do? I check temps and are fine. I try reinstlling Win10 and drivers, but not work.

Specs:
i5 6600k with H100i V2
GTX 1080 Mini zotac
1GB RAM 3200MHz
SSD evo 850
corsair PRO series 1050w.

Thanks for any help.
 
Jun 1, 2018
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yesterday i change to high perfomance increase some FPS but still under 100FPS with drops to 35FPS but before always 100¨+FPS
 
Jun 1, 2018
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0
10


I checked now, it's running at 800MHz, finally i found something. thanks you