AMD chief executive officer Hector Ruiz today uncovered that the TLB (Translation Lookaside Buffer) bug in all Phenom and Barcelona quad-core processors has been fixed. According to Ruiz, the fixed B3 stepping CPUs are "running through the paces internally" at this time with engineering samples expected to be shipped to customers within "2 to 3 weeks". Volume production is scheduled to begin "later in the quarter" and first systems with the fixed processors should become available late in Q1, president Dirk Meyer said. Production volume of Barcelona and Phenom quad-core will be about double of the nearly 400,000 units that were manufactured during Q4, CFO Bob Rivet noted. As previously reported, the higher speed and triple-core will be postponed for the end of the first and the beginning of the second quarter. Hector Ruiz also commented on the company's 45nm progress. Ruiz said that AMD's first 45 nm Opterons have been produced and the company is targeting for H2 2008 roll out.