The EVGA GeForce GTX 670 FTW resembles the GTX 680 much more than the GTX 670. The clock frequencies, the PCB, and the cooler are all from the GTX 680. Only the lower number of shader units reveal the fact that it's actually a GTX 670.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips