AMD outlined its CPU roadmap at its Financial Analyst Day and X-bit Labs notes the high-end parts don't look too good. By the end of the year we can expect the new Vishera and Piledriver cores, but these will have to last throughout the whole of 2013, a situation that will also occur in AMD's server lineup.
AMD will launch its next-gen FX-series chip code-named Vishera with Piledriver x86 cores (that will increase instructions per clock count and thus will be faster than existing ones) sometimes in the second half of the year, some project November-December timeframe. But unfortunately for AMD, it will have to sell those chips throughout the whole 2013 and compete against Intel's code-named Ivy Bridge-E and Haswell offerings as next year the company does not plan to refresh its high-end lineup at all. Similar situation occurs with AMD's server lineup: in 2013 the company currently has no plans to introduce new server processors.