bottleneck performance?

[einzele]

hi guys, my pc is running with i5 4460 and gtx 970.
im getting around 20fps at mor dhona peak hour with graphics setting at max and display object quantity at max.
i check on software monitor and it tells me my cpu is running at average 60-70% load across all 4 cores, and my gpu is sitting at 30-40% load.
then i ask my friends to come under the same settings to see whats his fps. one with gtx 780 and i7 3820 had 50 fps, another with i5 gen 3 and radeon 7850 had 37 fps.
at first i thought my i5 is bottlenecking my gpu, but then my friend with similar i5 had more 50% fps than me. i tried using DSR and multiply my res by 4x and still got 20ish fps.
btw my heavensward benchmark shows normal numbers, i got 10800 score which everyone with 970 get.

anyone can tell me whats wrong with my build?
i dont expect to get all flat 60fps, but i expect it should perform better than this.

edit: add screenshots