Cooling and noise production
We measure the temperature of graphics cards via the drivers after two runs of the Metro 2033 benchmark. Gigabyte apparently set the firmware to allow the cards to get a little warmer than usual, but 62 degrees is still far within safety margins. We always prefer a little higher temperature over more noise.
We are using a new method for measuring the noise levels. Graphics cards were the last product group that we did not test in our sound-proof box. We are able to do that now, and measure the noise at a 10 cm distance both when the card is idle and when under load. The load test is performed during a 3DMark Fire Strike Extreme GT2 run, after running 3DMark Fire Strike Extreme for 10 minutes to warm up the card.
The Gigabyte cards are very silent when idle, 25 dB(A) for the 770 and 28 dB(A) for the 780. You won't hear them from 10 cm away. Under load, the cards produced about 43 dB(A), fairly standard. It's good, but MSI has quieter cards.