I'm running Rage with my PC:

AMD HD 6770 PCI EXPRESS
Intel Core i5 2310
8 GB RAM
Windows 7 Pro

and I'm having visual issues, I know that there is a AMD driver for Rage but when i want to download the driver from bethblog.com
a window pops up and ask me for a username and password for support.amd.com,
I don't know what do I have to write, I mean, what username and password?, sorry if my question is stupid.
I want to play Rage without the visual issues please, What do i have to do?

Go to AMD.com and choose your drivers from the dropdown menu in the upper right. There should be no reason to have to log in anywhere to get drivers. If the new 12.8 don't work well, I am using 12.4 with no issues.