computer issue

so i just got a new PC build.
GTX 970 4gb vidoe card
I7 4790k processor
16gb ram
new samsung monitor running at 3840 x 2160
problem im having is that im only getting about 24 FPS, i feel it should be ALOT higher than that.
if i drop it to 1920 x 1080 the FPS goes up to about 50 or so, still think it should be able to rock more FPS than that.
any info or suggestions would be awesome, thanks
GTX 970 4gb vidoe card
I7 4790k processor
16gb ram
new samsung monitor running at 3840 x 2160
problem im having is that im only getting about 24 FPS, i feel it should be ALOT higher than that.
if i drop it to 1920 x 1080 the FPS goes up to about 50 or so, still think it should be able to rock more FPS than that.
any info or suggestions would be awesome, thanks