Hello, I have recently purchased the abovementioned graphics card, and have a query. When I view the clock speeds in Catalyst Control Centre (in the Graphics Hardware tab) it reports the core at 500Mhz and the memory at 594Mhz. This is at odds with the cards specification, which states that they should be 625Mhz and 900Mhz respectively. Interestingly, under the ATi Overdrive facility (which I have not used at all) it says that the core is 'currently' at 500Mhz, but the 'requested' speed is 621Mhz. Similarly, the memory is said to be at 594Mhz, with a requested speed of 900Mhz. So my question is, am I just seeing the slower speeds which the graphics card runs at when not under load (ie. on the desktop) when it is actually using its full speed when I am gaming? Or do I need to engage the Overdrive facility for the card to use its full power? Currently the Overdrive facility is greyed out, with a big 'Unlock' button waiting to be pushed. Thanks in advance for any help, Mark.