How to install amd graphic card drivers Ubuntu 13.10

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http://askubuntu.com – Could someone help me installing amd graphic card drivers on Ubuntu 13.10 x64? I 've spend 3 days trying several techniques i found on this and some other sites, but each time i get some issues. Thank you! fotis@fotis-Satellite-C660D:~$ lspci | grep VGA 01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS880M [Mobility Radeon HD 4225/4250] (HowTos)