Overclocking

To find the maximum overclock of our card we used a combination of GPUTool and our benchmarking suite.
The overclocks listed here were achieved with the default fan and voltage settings as defined in the VGA BIOS. Please note that every single sample overclocks differently, that's why our results here can only serve as a guideline for what you can expect from your card.



The overclocks of our card are 910 MHz core (40% overclock) and 1095 MHz Memory (22% overclock). Whoa! 40% overclock is impressive, even though it doesn't make much sense on a product of this performance class it is still very nice to see and suggests that AMD's manufacturing process is working like clockwork. The memory overclock is great too and seems held back by the GDDR3 memory chips on the card.

Overclocked Performance

Using these clock frequencies we ran a quick test of Call of Duty 4 to evaluate the gains from overclocking.


The actual 3D performance gained from overclocking is 29.3%.

Temperatures

Idle temperatures are comfortably low, I would have liked to see some better fan settings here for less noise. Under load temps rise quickly which seems to suggest that the cooler is working close to its limit. Yet we saw some excellent overclocking scores bringing the card up to 84°C which isn't terribly bad considering a 40% GPU overclock.

Clock Profiles

Modern graphics cards have several clock profiles that are selected to balance power draw and performance requirements.
The following table lists the clock settings for major performance scenarios and the GPU voltage that we measured. We measure on the pins of a coil or capacitor near the GPU voltage regulator.