We set the Power Limit to the maximum (125%) in MSI Afterburner to overclock our iChill GeForce GTX 670 HerculeZ 3000.
Relying on the high efficiency of the HerculeZ 3000 cooler, we carried out our overclocking experiments with the cooler’s fans regulated automatically.
We found the card to be stable with its GPU and memory clock rates increased by 105 and 1140 MHz, respectively.
The resulting GPU and memory frequencies were 1125 and 7352 MHz:
That’s a good result for a GeForce GTX 670 at default voltage, especially as the temperature of the overclocked card only increased by 3°C to 66°C and the fans rotated at the same speed as before.
In other words, the card was very quiet even when overclocked. You don’t often get this even with products from top-tier brands. Unfortunately, we couldn’t improve our overclocking result after increasing the GPU voltage.