Sandy Bridge-EP Launches

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Sandy Bridge-EP is the first major overhaul for Intel servers since 2009, and nearly ever aspect has been enhanced. The processor pairs 8 cores with a large last level cache, DDR3 memory controller, QPI 1.1, integrated PCI-E and power management. This article provides an overview of the major features, including new I/O optimization and power capping techniques and discusses the expected impact.

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Analysis of Haswell’s Transactional Memory

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Intel’s upcoming Haswell microprocessors include transactional memory and hardware lock elision that are exposed through the Transactional Synchronization Extensions or TSX. In this article, I discuss TSX and predict the implementation details of Haswell’s transactional memory and expected adoption across the industry, based on my previous experience.

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AMD’s Analyst Update

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AMD’s new management took to the stage to highlight a new strategy and share the roadmap for 2012-2013. The executives generally came across well and there are only a few changes from the existing focus, with no major shifts. The updated server roadmap seems challenging, given the competition, but client systems should do decently and expand AMD’s footprint in mobile.

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Medfield, Intel’s x86 Phone Chip

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For 4 years, Intel has struggled to move into the market for mobile devices. Conventional wisdom holds that x86 is too inefficient for smart phones. The recently announced 32nm Medfield proves that x86 is a viable option and that Intel can design smart phone products. We explore the Medfield SoC and analyze the impact on Intel’s mobile strategy.

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AMD’s Mobile Strategy

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With all the recent changes, AMD seems like a ship adrift at sea with no clear strategy or vision. We look at AMD and where they are likely to head in the coming years for tablets and phones and explain why they will stick with x86, rather than embrace ARM as some have suggested.

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ISSCC 2012 Preview

Highlights of the upcoming 2012 ISSCC include the first 22nm disclosures from Intel and several SoC papers from AMD, Cavium Networks and Oracle. Looking out further to the future, the clear focus is power consumption. There are several papers from Intel on low-power logic, one from IBM discussing 3D integration of embedded DRAM and a third from Fujitsu on system level power for the K supercomputer.

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Llano at Hot Chips

AMD’s Hot Chips presentation delved into Llano, the first mainstream Fusion product, with details and results for power management. Previous disclosures painted a poor picture, which is far from the truth. Given the older CPU and GPU designs and time-to-market pressure, the results are quite good. Llano’s power management focuses on the most important aspects and is a solid foundation for future generations that will be much more power aware and optimized.

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Sandy Bridge for Servers

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Intel’s Sandy Bridge-EP arrives late this year to take on AMD’s Bulldozer in 2 and 4-socket servers. It offers up to 8 cores with a new system architecture including 20MB L3 cache, 4 DDR3 memory controllers and faster 8GT/s QPI 1.1 links. Sandy Bridge-EP is also the first server CPU to integrate PCI-E 3.0 on-die, with up to 40 lanes – a significant bandwidth and power efficiency advantage. This article compares the system architecture and design to previous approaches and shows that Sandy Bridge-EP will be a compelling upgrade for 2-socket servers and attractive for certain 4-socket systems, particularly those with large I/O needs.

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Intel’s Quick Path Evolved

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Intel’s Quick Path Interconnect (QPI) was a massive step forward over the front-side bus that was used from 1995-2008. QPI finally caught up and exceeded AMD’s HyperTransport, helping Intel retake much of the server market. The next generation QPI 1.1 was re-architected based on trends and changes in the computer industry. QPI 1.1 is an incremental improvement at the physical and logical layer, but a substantial change in the coherency protocol. Sandy Bridge-EP will be the first product to implement QPI 1.1, later this year.

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AMD Fusion Architecture and Llano

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AMD has a grand vision for software and physical integration of CPUs and GPUs. The first Fusion generation focused on time to market, but created a solid foundation. Llano is a surprisingly attractive mid-range and value notebook product, due to the vastly enhanced power management. Future Fusion products will upgrade the CPU, GPU and media hardware and move towards a more tightly integrated computing model.

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