Overclocking the PowerColor HD5770 single slot cards was a straightforward process and we tested each card individually.
As these are single slot cards the cooler has a lot more work to do to maintain a stable environment. We managed to get one of the cards to 890mhz on the core while the other achieved 880mhz. Both cards maxed out at 1240mhz with the memory, these figures are almost identical to the XFX HD5770 single slot results we reviewed in August.
When we use these cards later in an overclocked CrossfireX state we will set them to 880mhz core and 1240mhz on the memory.