Overclocking

ATI's RV6xx GPUs use a new dynamic clock mechanism that dynamically selects the clock speed based on GPU load. Unlike previous cards this is done completely in hardware by the GPU without any intervention required by the driver. Our 2400 Pro has three clock states: Low (110 / 252 MHz), Medium (400 / 300 MHz) and High (525 / 400 MHz). Unfortunately Powercolor did not connect the automatic fan speed control, so the fan always runs at 100%. While it is not noisy it could be quieter if it was adjusted with temperature. All RV610 board designs do not support software voltage controls.

We used ATITool and the AMD GPU clock tool to manually search for the maximum core and memory clocks.



In the end the card runs completely stable at 648 MHz Core (24.6 % overclock) and 486 MHz Memory (22.7 % overclock). These overclocks are massive but in some benchmarks they do not make that much of a difference. Nevertheless it shows that there is quite some potential left in this card which you can easily benefit from for free.


The temperature differences between load and idle are very small. Overclocking also raises the GPU temperature by only 3°C.