It should be fine, honestly.
The only reason why I haven't gone further with mine is because I'm on a reference cooler and this card generates a metric ton of heat. My card hits 90C at load.. kind of ridiculous and yes it's completely dust free ^-^
Once upon a time I tested my cards limits and it couldn't get past 860MHz, no matter the voltage.. In fact it became worse with more volts, so I just stuck to 100 MHz over stock considering the heat. My card's a rather weak clocker but most people can hit 900Mhz just fine.