cpu maxing out at 22% utilization with low temps

[flams_and_diddles]

Specs:

i5-4690k with stock cooler

750 ti windforce

ASRock z97 anniversary atx motherboard

8gb ddr3-1600 ram

samsung 850 evo ssd and wd blue hard drive

Corsair cx430m power supply

windows 10

 

I haven't overclocked anything before, and I recently tried to overclock my 750 ti, and it was going well until I tried running 3D mark fire strike, and my score was 3127. A couple weeks ago when I last ran it I got a 4084. I looked at the details, and my graphics score was higher, but the physics score was wayyy lower than it was before. So I tried cinebench, and my score was way lower than before too. I ran cinebench a while ago and got a 544 on the cpu test, and now I'm getting around 110 from several tests. I opened task manager to see if anything weird was going on, and while running cinebench, my cpu utilization was maxing out at 22%. I turned off of my overclock and set all the settings back to default, then I restarted my computer and tried cinebench again, and nothing changed. I wondered if maybe the cpu was thermal throttling for some reason, but my temps were staying in the mid 30's. What's causing my cpu to run like that and how can I fix it? Thanks for any help.