GTX 1080 FE seems to be preforming sub par0

I built a new rig 8 months ago has the following specs CPU: 5820k CPU RAM: 16 GBs DDR4 Mobo: Gigabyte Ultra gaming X99 GPU: GTX Zotac 1080 FE For some reason ever time I bench mark my rig it’s a bit lower than expect and what I compare to what other people get with the same card. I scored a 3700 on UnityEngive Valley I even did one a 1440p with no AA sore was 4300 I’ve look at other scored online and people are getting in the 5,000s with 1440 with no AA And in the 4000s with 1080p 8xaa What could cause this? I know my CPU doesn’t have as good CPU per core performance as my old I7 4790k in my other rig.