Martin said:Not easy to determine what's the real GPU, but it's GK106-based, so it might be a GTX 650 or 650 Ti.
To restore the card to its original parameters and name, you'd need to re-flash it with the original VBIOS. But I don't recommend this as it might be quite difficult to find the proper VBIOS.
If you bought such card, best is to return/RMA it.
Martin said:Drivers are same, but they setup the GPU based on certain identification parameters, which have been overwritten when the VBIOS was re-flashed.
You might try to compare some parameters like maximum clocks using the GPU-Z tool and check if they match with a GPU in the 6xx series.