AMD Phenom 9000 is quad core, and 8000 is tri-core
 

AMD's slideware hides the actual performance numbers, but the lads put AMD Phenom 9500 (2.2 GHz) system as the 100%, baseline performance system. In further slideware, it was revealed that Overall Performance (Office Productivity + Digital Media + Gaming) will take Phenom 9700 5.4% faster than the 9500 (2.2 GHz), while competing Core 2 Quad Q6600 scores 2.5% more than 2.2 GHz. In Office Productivity itself, 9700 is 5.7%, while Q6600 is 3.2% faster. Digital Media puts Intel on top with 10.4% advantage over baseline mode, while clock-per-clock competitor was 8.5% faster than baseline. In gaming, 9700 system scores 2.2% faster results than baseline, while Q6600 is 3.6% slower than baseline.

http://www.theinquirer.net/gb/inquir...quad-core-8000