as root do this…
| CODE | 
| wget http://www2.ati.com/drivers/linux/ati-driver-installer-11-5-x86.x86_64.run | 
| CODE | 
| chmod a+x ati-driver-installer-11-5-x86.x86_64.run | 
| CODE | 
| ./ati-driver-installer-11-5-x86.x86_64.run –buildpkg RedHat/RHEL6_64a | 
| CODE | 
| yum install –nogpgcheck fglrx64_p_i_c-8.85-1.x86_64.rpm | 
| CODE | 
| aticonfig –initial | 
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