Something is really wrong with those results. The CPU should not be a bottleneck, so assuming you had the EXACT same settings your GPU must be getting stuck at a lower frequency.
Possibly at around 1200 to 1300MHz?
Try running the benchmark again whilst monitoring with MSI Afterburner, EVGA Precision OC or suitable tool that has an OSD to overlay BOTH of these:
1) GPU frequency, and
2) GPU usage
Normally in that benchmark you should see about 95% usage and 1900MHz+ frequency on the GPU (except between scene transitions).
You might have for example, 1250MHz frequency and high GPU usage. (You should get the same thing if the CPU was the bottleneck but it would have to be really bad to be a bottleneck for this benchmark.)
*If you manually overclocked, try doing this:
a) remove any software used to OC or monitor the graphics card
b) run DDU
http://www.guru3d.com/files-details/display-driver-uninstaller-download.html
c) reinstall the video drivers
d) rerun the benchmark
if still wrong, then
e) verify CPU frequency under load with Task Manager ("CPU Speed" should say about 3.7GHz?) for say Prime95 (just enable half the threads)
(right-click START)-> TM-> Performance-> CPU-> "Speed" (it should vary a lot in idle usage, then be pretty stable under load)
f) if still wrong (I mean if CPU results are good), contact the graphics card manufacturer