I run Ubuntu 14.04 and I installed the Ati drivers from Software Update -> Additional drivers but on the official Ati website the latest linux beta drivers have a newer version, if that version supports kernel 3.13 can I download the drivers and install them from there since they are the latest? Thank you for your time.
The latest version of the proprietary ATI driver in Additional Drivers for Ubuntu 14.04 is fglrx-updates 13.3. fglrx-updates 13.3 supports the 3.13 Linux kernel. The latest version of the AMD Catalyst Driver for Linux from the AMD Graphics Drivers and Software website is 14.4. I don't think there's really much point in installing the AMD Catalyst Driver in Ubuntu 14.04 unless you tried the fglrx-updates driver first and found something wrong with it.