dynamic power management. In June 2006, AMD executive vice president Henri Richard had an interview with DigiTimes commented on the upcoming processor developments: Live demonstrations On November 30, 2006, AMD live demonstrated the native quad core chip known as "Barcelona" for the first time in public, while running Windows Server 2003 64-bit Edition. AMD claims 70% scaling of performance in real world loads, and better performance than Intel Xeon 5355 processor codenamed Clovertown. On January 24, 2007, AMD Executive Vice President Randy Allen claimed that in live tests, in regard to a wide variety of workloads, "Barcelona" was able to demonstrate 40% performance advantage over the comparable Intel Xeon codenamed Clovertown dual-processor (2P) quad-core processors. The expected performance of floating point per core would be approximately 1.8 times that of the K8 family, at the same clock speed. On May 10, 2007, AMD held a private event demonstrating the upcoming processors codenamed Agena FX and chipsets, with one demonstrated system being AMD Quad FX platform with one Radeon HD 2900 XT graphics card on the upcoming RD790 chipset. The system was also demonstrated real-time converting a 720p video clip into another undisclosed format while all 8 cores were maxed at 100% by other tasks. Sister microarchitecture On the December 2006 analyst day, Executive vice president Marty Seyer announced a new mobile core codenamed Griffin launched in 2008 with inherited power optimizations technologies from the K10 microarchitecture, but based on a K8 design. TLB bug In November 2007 AMD stopped delivery of Barcelona processors after a bug in the translation lookaside buffer (TLB) of stepping B2 was discovered that could rarely lead to a race condition and thus a system lockup. A patch in BIOS or software worked around the bug by disabling cache for page tables, but it was connected to a 5 to 20% performance penalty. Kernel patches that would almost completely avoid this penalty were published for Linux. In April 2008, the new stepping B3 was brought to the market by AMD, including a fix for the bug plus other minor enhancements. Iterations of the release to the quad-core processor and shutting down one of the four cores to become a triple-core processor, which the technique has been popular for making one or more mainstream GPU cores from a single high-end GPU core by blowing out parts of the circuit to save R&D costs while targeting more markets