The Use of Dual Graphics Devices on the High-End HPxw9300 Workstation

The architecture of the HP xw9300 Workstation leverages multiple new technologies, including:• The use of PCI Express x16 for each of two separate graphics channels. Each x16 channelemploys sixteen PCI Express lanes to provide 8 GB/second peak (4 GB/second in eachdirection) of bandwidth to the connected device.• Dual AMD Opteron series 200 processors, featuring 32- and 64-bit addressing, AMD’s DirectConnect Architecture, an integrated memory controller, and the AMD HyperTransport™processor interconnect technology.• HP’s renowned workstation engineering capabilities, including a personal workstation packagethat provides up to 700 watts of power (specifically for high-end graphics cards that requirelarge amounts of power), quiet cooling, completely tool-less chassis, and extensive connectivityoptions.• NVIDIA nForce Professional and AMD 8131 chipsets for high performance I/O and extensiveconnectivity.• The NVIDIA Quadro FX family of graphics solutions for PCI Express I/O interface. The NVIDIAQuadro FX family is specifically designed for high performance and high resolution needs ofhigh-end 3D graphics applications. The product family also supports NVIDIA’s Scalable LinkInterface (SLI). SLI allows custom high-performance graphics solutions, such as parallelrendering and compositing, even if a single display is used (see “SLI,” below).These technologies are described in additional detail below. Architecture As shown in Figure 2, the HP xw9300 Workstation employs one or two AMD Opteronprocessors, each with multiple ports for memory, I/O, and processor-to-processor communication.In addition, the AMD Opteron processor enables simultaneous 32- and 64-bit computing.The AMD Opteron processors feature an integrated (on-chip) DDR Memory Controller, reducingmemory latency. Reduced memory latency is important for the many workstation applications thatexhibit a high miss-rate on processor cache(s). Another benefit of the integrated memory controllerstrategy is that memory bandwidth is distributed across the processors, allowing the aggregatesystem memory bandwidth to double when the second processor is added.Each memory controller is capable of supporting up 8 GB of ECC-protected memory, resulting ina total capability of 16 GB with both processors installed.

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