So for all those who asked, here it is, Gigabyte's take on NVIDIA's second-fastest single-GPU graphics card. Look familiar? It should, as it uses an identical design to the company's GeForce GTX 680.
What you're looking at is essentially Gigabyte's GeForce GTX 680 OC with a different core; at the heart of this beast, the GTX 680 chip (GK104-400) has been replaced with the pin-compatible GTX 670 part (GK104-325).
There's nothing inherently wrong with borrowing the GTX 680 PCB, but Gigabyte's card isn't well disguised. Look just above the PCIe interface and you'll see the sticker that's used to cover up the card's original 'GV-N680OC-2GD' branding. Applying a sticker is cheaper than creating a whole new PCB, but it can leave a sour taste in the mouth of the consumer and the sticker serves only to remind you of the top-end GTX 680 you could have bought.