Based on the company's Piledriver architecture, the AMD Opteron 6300 server processors are intended for use with virtualised servers.
In addition to "industry-leading performance" on the Specjbb2005 benchmark, the 6300 also delivers up to 40% higher performance per watt compared with the 6200.
AMD also claims "impressive results" for high-performance computing applications such as LAMMPS and NAMD3, which are used in molecular dynamics.
The 6300 family ranges from the $293 6320 (2.8GHz, eight cores, boostable to 3.3GHz) to the $1392 6386 SE (2.8GHz, 16 cores, boostable to 3.5GHz).
The chips incorporate AMD-V virtualisation technology for near native performance, up to four x16 HyperTransport links (up to 6.4GT/s), and support up to 384GB of RAM per processor.
"The key to a winning solution for customers is working with OEMs and other solution providers to minimise TCO with a combination of cost-effectiveness and superior performance per-watt.
"AMD Opteron 6300 Series processors are uniquely positioned to be the difference-maker customers are seeking," he added.
6300 processors are available immediately; servers from Dell and HP should ship by the end of the year.