AMD’s Quad-Core, Triple-Core Microprocessors Slip into Q2 2008
 

After a Translation Lookaside Buffer (TLB)-related erratum was discovered in AMD Phenom microprocessors and AMD had to impose a fix that reduced performance of the CPUs, Advanced Micro Devices had to announce a new B3 stepping of the chip with bug corrected without performance degradation. Unfortunately for AMD, the new chips will only become available for its customers sometime in Q2 2008, not in Q1 2008, as expected.

http://www.xbitlabs.com/news/cpu/dis...rocessors.html