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To: Tony Viola who wrote (19105)	6/28/1999 8:21:00 PM
From: E. Graphs	Respond to of 25814

Group Approves New PCI Bus That Doubles Throughput techweb.com >>Servers and high-powered workstations are about to get a big bandwidth boost. The PCI Special Interest Group (SIG), which manages the PCI specification, has approved a new PCI bus that doubles throughput. IBM, Hewlett-Packard and Compaq-normally competitors in the PC server market-developed the new bus, dubbed PCI-X, last year. >>The faster bus was designed for high-speed I/O devices, such as Gigabit Ethernet cards, Ultra3 SCSI and Fibre Channel.... >>PCI-X is not likely to be found in cheaper, low-end machines for some time, since it adds to the cost of the motherboard. Currently, PCI supports one 64-bit bus running at 66MHz, while the rest run at 32 bits or 64 bits at 33MHz. Maximum throughput for a system is 532MBps. PCI-X doubles all of that, cranking up one bus to 133MHz at 64 bits and the rest of the buses to 66MHz at 64 bits for a maximum throughput of 1.06GBps. It will initially be used in servers and workstations, since they need all the throughput they can get. >>To receive the benefit of the high-speed bus, vendors will have to create their own PCI-X cards that run at the higher speed. Adaptec, 3Com and LSI Logic have all signed on to support the new bus. Both PCI and PCI-X buses and cards will be backward compatible, according to Richard Baek, executive director of the SIG. A PCI card will work in a PCI-X slot, and any PCI-X card placed in a standard PCI slot will automatically step down its speed to run at 33MHz. >>The SIG expects its membership to approve the spec by the third quarter and for products to begin appearing six to nine months after that. Expect a number of PCI-X-based systems to be announced at Comdex in November, according to Baek.<<