NVIDIA nForce4 SLI Technical Specifications (Intel)



Front Side Bus: Pentium 4 CPU Interface

  • 2× address and 4× data
    • QDR (Quad Data Rate) support for 400 MT/s - 1066 MT/s (100MHz -266MHz FSB)
    • Theoretical maximum burst bandwidth of 8.5GB/s
  • Standard bus speeds up to 266MHz supported
  • 36-bit addressing for access to 64GB of memory space
  • Dynamic Bus Inversion
  • Frontside bus (FSB) pipeline depth of 12 in-order queue depth
  • Hyper-Threading Technology support

Dual Channel DDR2 128-Bit Memory Interface

  • Two independent 64-bit memory controllers
  • Can also operate in ganged mode (as one 128-bit controller)
  • Support for 400 MT/s (200MHz), 533 MT/s (266MHz), and 667 MT/s (333 MHz) for a theoretical maximum bandwidth of 10.6 GB/s
  • Up to eight internal banks per DDR2 chip
  • Up to two DIMMs per controller for a maximum of four DIMM support
    • Separate 64-bit data bus per controller
    • Separate address and control bus per DIMM
    • Up to 16 GB using four 4-GB DIMMs
  • Supports synchronous and pseudo-synchronous operation with FSB
  • Supports un-buffered non-ECC DIMMs
  • Low power suspend-to-RAM (S3) support
  • Active and pre-charge power down
  • Support for SPD (Serial Presence Detect) scheme for DIMM detection and configuration

Power Management

  • Internal clock generator
  • Support for Pentium 4 performance states
  • Support for HyperTransport link lower power disconnected state
  • PCI Express L0s and L1 active link power management support and L2/L3 low power state support
  • Full ACPI 2.0 and PCI PM 1.1 support, including C2/C3, Power on Suspend,
  • Suspend to RAM, Suspend to Disk, and Soft-Off CPU power state support.


Native Gigabit Ethernet technology

  • The fastest Gigabit Ethernet solution in the market
  • Supports 10/100/1000Base-T Ethernet
    • RGMII or MII interface

Advanced networking features

  • TCP segmentation offloads
  • Jumbo frames
  • Checksum offloads
  • Interrupt moderation
  • Traffic prioritization
  • Remote wake-up
  • Network management for easy set up, configuration, and monitoring
TCP/IP Acceleration
  • Dedicated hardware engine
  • Reduces CPU overhead


NVIDIA MediaShield™ Storage

  • RAID 5 faster disk access with fault tolerance and optimized capacity
  • RAID 0 disk striping support for highest system and application performance
  • RAID 1 disk mirroring support for fault tolerance
  • RAID 0 +1 disk striping and mirroring support for highest performance with fault tolerance
  • NVIDIA Disk Alert System provides a visual indication so users know exactly which SATA hard drive to replace during an array failure
  • Converting allows users to change the current state of an array to another using one single step without reboot of the PC
  • Cross Controller RAID uniquely supports both SATA and PATA disk devices within a single array

Serial ATA

  • Support for SATAII 3Gb/s and SATA 1.5Gb/s disk controller standards
  • Supports full Tagged Command Queuing (TCQ) and Native Command Queuing (NCQ)

Dual controller architecture

  • Two separate and independent controllers. Results in up to twice the bandwidth to disks
  • Four (4) integrated SATA 3Gb/s ports

Fast Ultra ATA-133 Disk Drive Controller

  • 5V-tolerant primary and secondary channels, with support for up to four devices
  • Supports Ultra-DMA modes 6-0, DMA modes 2-0, and PIO modes 4-0
  • Industry-standard PCI bus master IDE register set
  • Separate independent IDE connections for 5V-tolerant primary and secondary interfaces


PCI Express Interface - SLI™

  • PCI Express high-performance, scalable interconnect. Rapidly being adopted by the PC industry; designed to replace the AGP and PCI interconnects currently in use.
  • A x16 PCI Express link has 4 times the total bandwidth of today's AGP 8X interface
  • x16 PCI Express link for high performance graphics cards featuring the latest Graphics Processors with DirectX 9.0 and Shader Model 3.0 support
  • Additional x1 PCI Express links for other add-in cards
  • Five independent PCI Express controllers with 20 total lanes that can be configured as follows:
    • One ×16 and four ×1 PCI Express lanes
    • Two ×8 and three ×1 PCI Express lanes (SLI Mode)
  • x16 controller can support isochronous data channel
  • Supports PME messages for power management
  • 2.5 GHz support for a theoretical maximum bandwidth of 2.5Gb/s per lane per direction

USB 2.0

  • USB 2.0 Enhanced Host Controller Interface (EHCI) / USB 1.1 Open Host Controller Interface (OHCI)
  • Support for up to 10 ports
  • Supports transfer rates at high speed (480Mbps), full speed (12Mbps), and low speed (1.2Mbps)
  • Dynamically configures slower devices for best utilization of bandwidth
  • Allows USB concurrency

PCI interface

  • Includes an arbiter that supports six external master PCI slots.
  • Features of the PCI interface include:
      PCI 2.3-compliant, 5 V tolerant
    • Supports six external PCI slots at 33MHz
    • Supports five bus master arbitration
    • PCI master and slave interfaces
    • Supports both master-initiated and slave-initiated terminations
    • Bidirectional write posting support for concurrency
    • Flexible routing of all four PCI interrupts
    • Supports read ahead: memory read line (MRL) and memory read multiple (MRM)


AC '97 2.3 compliant interface

  • Supports 2, 4, 6, or 8-channel audio
  • Dual AC-Link - supports up to two codecs
  • Dual SPDIF - supports two simultaneous digital outputs; handles stereo PCM or AC-3 output
  • 16-bit or 20-bit stereo, 48kHz output and 16-bit input streams across AC-Link
  • 24-bit, 96kHz stereo output on the secondary SPDIF output
  • Supports input, output, and general purpose input/output channels for host-based modems
  • Separate independent functions for audio and modem