Originally Posted by Nytebane
im also getting some artifacts in cs, even at 651/760
Those are pretty decent clocks for stock air cooling, but they can probably be improved. I would use ATI tool and just set up a profile for oc'ing with the fan control at 100%. I think the x1600xt has adjustable voltages, but I am not sure. If you have adjustable voltages try tweaking the core and mem volts. I would take off your side panel to try and get more air to the card. You might want to consider lapping the stock heatsink, or upgrading to aftermarket cooling once more become availible.
PS. Where is Harwhich? I am in Saugus just north of Boston