Filed under: Desktops, LaptopsAMD may be busy sorting out issues with its quad-core Phenoms and hard at work on "completely different" chip architectures, but that isn't stopping the company from aggressively updating its roadmap, announcing today plans for 6- and 12-core server-grade Opterons. Both the new 6-core chip, codenamed Sao Paulo, and the 12-core unit, codenamed Magny-Cours, are based on a brand-new pl