Summary: I have been using this card little over a year and I couldn't be happier. I have been buying Gigabyte cards ever since they started to produce the "Windforce" OC editions. The windforce cooling system really makes a huge difference in temperature control. Even under full load stress testing the video card never rises over 67c, and even when ramped up to 100% power the fans are incredibly quiet compared to the fans that come with stock GeForce cards.
Summary: Honestly, if you have one of these already, get a second one to make SLI. Don't waste money on the 780 yet. Wait till the 800 series first, as two 670's can beat ONE 780. If you don't care about money, just get two 780's.
Summary: Only problem was getting it to fit in ATX PC. Went to NVIDA for latest downloads Took a few days to understand and get all the bells and whistles working. Beautiful colors and the Gigabyte GTX 670 card works great. For the first time when playing shooter games, it fill like I'm on a level playing field. Plus didn't wait long for GTX 670 to arrive, less than a week.
Summary: At first this product had some occasional loud (airplane motor loud) buzzing sound (likely coil whine from my limited research) on full load, and even on idle, it is running quiet as a motor now on idle and full load. The temps on this thing on all my games at max setting maintain safe temps and go nowhere near the danger zones; it ran at max at about 85 degrees celsius on the new Batman game.
Summary: I have 2 of these cards in SLI and works like a charm. Only issue I encountered was PCIe 3.0 with this card with an Ivy Bridge CPU. I did a little research to find compatibility issues with this card and ivy bridge cpu. If I enabled PCIe 3.0 in the bios and booted up to Windows my monitors would randomly go black for a couple seconds and it would keeps telling me my nvidia drivers crashed and have restarted.
Summary: This product is great I already had one of these cards but was looking to go to a SLI configuration so bought another of the same card. Works without hitch. Also prompt delivery, living outside of the USA and neighbouring borders I was impressed with the fast shipping times.