ClusterFunk

As Promised here is a AMD CPU family comparison resource

Loads of information here

Desktop Orientated
http://products.amd.com/en-us/DesktopCPUResult.aspx

Select the CPUs your interested in

Then click compare to get side by side comparison

Server Orientated (Opteron)

http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_8796,00.html

Same set up as desktop CPUs plus additional benchmark and architecture documentation. 

Including comparison for 1st, 2nd and 3rd Generation Opteron plus go info on AMD and Intel processor architecture

General AMD products page:

Including CPU, GPU, Motherboards (chipsets)
http://products.amd.com/en-us/default.aspx