1 PCI Express

2FUJITSU CONFIDENTIAL What is PCI Express PCI-Express, formerly known as 3GIO(3 rd Generation I/O, is a 2-way, serial connection that carries data in packets, similar to the way it is transferred over Ethernet connections. The PCI-Express bus will no longer be a single parallel data bus through which all data is routed at a set rate. Rather, an assembly of serial, point-to-point wired, individually clocked ‘lanes’ each consisting of two pairs of data lines will carry data upstream and downstream. As the technology goes to market, each of these lanes should be capable of a 2.5Gb/s data rate in each direction. The overall sustained transfer rate roughly equals 200MB/s.

3FUJITSU CONFIDENTIAL Key Advantage for PCI-Express Performance 4 GB/sec peak bandwidth in standard x16 configuration is approximately double that of AGP 8X for Graphics full bandwidth is also available in both upstream and downstream directions, while AGP provides limited upstream bandwidth Power Management serial bus reduces number of signals required support for low-power idle Cost New capabilities are enabled without adding significant incremental system cost Reliability Fewer failure points due to smaller number of physical connections more robust

4FUJITSU CONFIDENTIAL 75W Videocard Capabilities Currently PCI-Express X16 is being designed to provide up to 75W of power for video cards, as opposed to the current 25W/42W allowed by AGP8X. Most modern cards already consume more than this amount, as evidenced by the extra power connectors that appear on today's high-end video cards. PCI-Express X16 and 8x AGP slots cannot coexist on the same motherboard. That's okay, considering ATI and Nvidia will have essentially stopped producing high-end AGP graphics cards by the end of Q2:2004.

5FUJITSU CONFIDENTIAL PCI-Express Connections PCI-Express connectors are similar in appearance and connection method that current 32-bit PCI slots. Designs for motherboards to be released in 2004 indicate that PCI-Express 1X slots will be about the size of current modem riser slots (about 1" long), while the X16 interface (164-pins) for graphics will be very similar in appearance to the standard AGP port.

6FUJITSU CONFIDENTIAL PCI-Express for Mobility A new standard called the 'ExpressCard' has been created by the PCMCIA group in cooperation with the development of PCI-Express by the PCI-SIG group. The interface and form-factor (similar in appearance to the current PC Card form factor for laptops) supports both USB2.0 and PCI-Express.

7FUJITSU CONFIDENTIAL Roadmaps Industry heavyweights ATI, Nvidia, and even AMD have already given PCI-Express their support, with AMD stating specifically that they see the PCI-Express technology working well with their Hypertransport technology. Adding to the potential flexibility of the PCI-Express system, is the capability of external connections. The same 200MB/s point-to- point connections could be extended over cable outside the box to a distance of approximately 5 meters. Add this to the fact that designated PCI-Express connectors will be hot-pluggable, and you have the potential for some very interesting uses of the technology.

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