DVI - HD15 is the normal cause of this.
Edit your client_settings file and adjust the native height and width and refresh rate to your monitors maximum, the issue will be that if the monitor is not being reported correctly in the dxdiag then these settings will be a very high number.
Thanks for the tip but what file am I looking for and where? Is it a SWTOR file or nvidia file?
Sorry if this sounds a stupid question, searched for client_settings but nothing found.