The Intel® 460GX chipset, the first Intel chipset in the Itanium™ processor family, is optimized for 1–4 way Itanium processor platforms and offers high performance and availability for e-business. The 64 GB of system memory support and 4.2 GB/s of memory bandwidth provide outstanding performance for server transactions and workstation simulation by enabling the memory bus to feed both the full system bus and I/O bus bandwidths simultaneously. The 460GX provides high-end capabilities for web servers and graphics intensive applications thanks to the 2-GB I/O bandwidth as well as support of multiple GB ethernet cards and AGP 4X. SMBus compatibility and comprehensive reliability, availability and serviceability (RAS) features enable highly available servers for e-business applications.

Features:

• High performance hardware based on IA-64 architecture
  • 4.2 GB/s memory bandwidth can simultaneously support both the full system bus and the full I/O bus bandwidths
  • Architectural support for 64 MB to 64 GB of SDRAM
  • Support for up to four bridge chips that interface to the 82461GX (SAC) through four Expander channels, each 30 bits wide and providing 533 MB/s peak bandwidth
  • AGP 4X compatible, via the 82465GX (GXB) and two Expander channels running at 266 MHz totaling 1 GB/s peak bandwidth
  • Support for two 64-bit, 66-MHz PCI buses using one 82466GX (WXB) component per Expander channel
  • Support for two independent 32-bit, 33-MHz PCI buses or one 64-bit, 33-MHz PCI bus via the 82467GX (PXB) per Expander channel
  • Data streaming support between Expanders and DRAM, up to 533 MB/s per Expander channel
• Extensive RAS features for mission-critical needs
  • ECC protection on the system bus data signals
  • Memory ECC with single-bit error correction, double and nibble error detection
  • Address and data flows protected by parity throughout chipset
  • ECC bits in DRAM accessible by diagnostics
  • Fault recording of multiple errors; sticky through reset
  • JTAG TAP port for debug and boundary scan capability
  • I2C slave interface for viewing and modifying specific error and configuration registers
  • Bus, memory and I/O performance counters
  • Support of ACPI/DMI functions (support is provided in the IFB)
• High bandwidth system bus for multiprocessor scalability
  • Support of the Intel® Itanium™ processor 64-bit data bus
  • Full support for 4-way multiprocessing
  • 266 MHz data bus frequency
  • Cache line size of 64 bytes
  • Enhanced defer feature for out-of-order data delivery using IDS#
  • AGTL+ bus driver technology
• Features to support flexible platform environments
  • Hardware compatible with IA-32 binaries
  • AGP address space up to 32 GB supported
  • Support for Auto Detection of SDRAM memory type and mixed memory sizes allowed between rows
  • Supports 16-, 64-, 128- and 256-Mbit DRAM devices
  • Full support for the PCI Configuration Space Enable (CSE) protocol to devices on all Expander channels
  • WXB supports 3.3 volt PCI bus operation (supports universal and 3.3 volt PCI cards) and has an Integrated Hot-Plug Controller**
  • PCI Rev. 2.2 compliant on the WXB and PXB
  • GXB supports fast writes and 1x, 2x and 4x data rates
  • 1 MB or greater of firmware storage provided by the 82802AC (FWH)
  • Interrupt controller, bus-mastering IDE and Universal Serial Bus supported by the 82468GX (IFB)
  • Support of 8259A mode, APIC mode and SAPIC mode interrupts via the UPD55566S1-016 (PID) provided by NEC*