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6,099 Posts
you're just probably reaching the limits of it's overclocking. i have the 4830 and i get unstable everytime my memory goes above 1100. you need to add more volts to it.
this should be helpful enough
http://www.overclock.net/graphics-ca...ml#post5707207
http://www.overclock.net/ati/368105-...-oc-ready.html
cheers
this should be helpful enough

http://www.overclock.net/graphics-ca...ml#post5707207
http://www.overclock.net/ati/368105-...-oc-ready.html
cheers