Is my GTX 780 ti underperforming?

[Gabe Newell]

I have an evga gtx 780ti sc and my unigine heaven benchmark score is 1608 with the highest settings.

 

[rgd1101]

full system spec?

 

[Gabe Newell]

full system spec?[/q

evga gtx 780ti sc, intel core i7 3770k 3,5 ghz (OC'ed to 4,2) , asus P8Z77-M PRO motherboard, 8 gigs of ram, corsair cx 750w PSU. I think that was all. The CPU uses the stock cooler, my pc is a prebuilt one, i have only changed the PSU and GPU, i use the latest drivers from Nvidia, i used display driver uninstall and clean install option from nvidia to make sure the old drivers were completely gone.