NVIDIA GTX 780 Classified overclocking issues

[UraniumEagle]

Hey all. I'm using a little bit of an older card, but recently upgraded to a LGA1151 setup (http://pcpartpicker.com/p/Hj2mMp) but decided to wait until Pascal series GPU's came out until I upgraded that. So I have an EVGA 780 Dual Classified with stock ACX cooler that I've made a few attempts to overclock but my performance just seems to be a just a little less than where I think it should be. According to Geeks3D I should be getting around 67 fps and ~4000 points with *stock* settings. I realize this card is 12 months old, but is this acceptable performance for the card? 

 

http://www.geeks3d.com/20141209/gpu-benchmark-scores-1080p/#gpuburger

 

I'm using Precision X 16 to OC and tried the following settings in a quick test. My core tempt never surpassed 75C during these tests. I usually run it at +120, +200. 

 

FurMark @1920x1080 AA: Off

Stock Clock (Base/Boost Clock: 993MHz/1046MHz) - 3566 points @ 59 fps

103%/84C GPU Clock +50 Mem Clock +50 – 3651 points @60 fps

104%/85C GPU Clock +100 Mem Clock +100 – 3703 points @61 fps

108%/91C GPU Clock +150 Mem Clock +150 – 3787 points @63 fps

110%/95C GPU Clock +120 Mem Clock +200 – 3816 points @63 fps

110%/95C GPU Clock +130 Mem Clock +200 – 3860 points @64 fps

110%/95C GPU Clock +130 Mem Clock +250 – 3892 points @64 fps

[Timopomer]

gpuboost has many variables