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» VIA VT8237R Plus

VIA K8T890 - Bringing PCI Express to the AMD64 Platform

This product is available fully ROHS-compliant.

As the PC increasingly deals with demanding entertainment and multimedia applications, such as high definition video and the latest 3D games, ever increasing demands are being placed on system bandwidth. To meet these changing requirements the industry is transitioning to PCI Express connectivity, which delivers the bandwidth needed for today’s most bandwidth hungry applications, as well providing the headroom needed for future generations of applications.

The first PCI Express chipset for the AMD platform, the VIA K8T890 chipset is designed to fully meet the increased system bandwidth demands placed on the PC. Designed to support a complete range of AMD Athlon™ 64, Athlon 64 FX, Opteron™, and Sempron™ processors, the VIA K8T890 delivers high performance, comprehensive features, and rock solid stability. The K8T890 chipset is optimized to work seamlessly with the latest PCI Express graphics cards, featuring a PCI Express x16 connection for up to 4GB/s of dedicated graphics bandwidth per direction, and provides four PCI Express x1 connections. Each 1x PCI Express connection provides 250MB/s per direction bandwidth to PCI Express peripheral devices such as Gigabit Ethernet and HDTV tuner cards.

The VIA K8T890 chipset has received PCI-Express certification, having successfully completed the rigorous testing procedures of the PCI-SIG Compliance Workshop.

The VIA K8T890 integrates VIA’s Hyper8 technology supporting a 1GHz/16-bit HyperTransport processor-to-chipset link, that delivers up to 8GB/s of bandwidth to help ensure all AMD64 processor-based systems achieve their full performance potential. The VIA K8T890 chipset also utilizes asynchronous bus architecture, providing improved system optimization options to enable power users to squeeze the very most out of their systems.

For connectivity to the South Bridge the VIA K8T890 features a high bandwidth Ultra V-Link bus to allow communication between the chipset North and South bridges at a blazing 1GB/s. When combined with solutions such as the market-leading VIA VT8237R Plus South Bridge and a broad array of VIA companion chips, the VIA K8T890 chipset provides the most comprehensive range of storage, multimedia and connectivity features available for the AMD64 processor platform today, including native Serial ATA and V-RAID, 6-channel or 8-channel VIA Vinyl Audio, VIA Velocity™ Gigabit Ethernet, USB2.0, and 1394.

Features of VIA K8T890

VIA K8T890
North Bridge  
Processor Support

AMD Opteron / Athlon FX / Athlon 64 / Sempron (939, 940 & 754 pin)

Front Side Bus 1GHz/16-bit (Upstream & Downstream) HyperTransport Bus Link
PCI Express Graphics Support PCI Express x16 Graphics
PCI Express Peripheral Support 4 PCI Express x1
Memory Support

DDR memory controller integrated directly into AMD64 processor¹

Bus Architecture Asynchronous
South Bridge VIA VT8237R Plus
North/South Bridge Link Ultra V-Link (1066MB/s)

VIA Vinyl™ 6-channel Audio (AC'97 integrated)

VIA Vinyl™ Gold 8-channel Audio² (PCI companion controller)


VIA Velocity™ Gigabit Ethernet (PCI companion controller)

VIA integrated 10/100 Fast Ethernet

PCI Devices/Slots

6 slots


Dual Channel Serial ATA supports 2 SATA devices

SATALite™ interface for two additional SATA devices 4 total)

V-RAID RAID 0, RAID 1, and RAID 0+1³ & JBOD (SATA)
IDE Parallel ATA133 (up to 4 devices)
High Speed USB 8 ports
Modem MC'97
Package 933 Ball Grid Array
Power 1.5V core, 0.15um process

¹Please refer to AMD validated AMD64 Processor Compatible DDR Memory Modules

² 8-channel audio requires addition of VIA Vinyl Gold companion controller

³ RAID Level 0+1 requires four Serial ATA drives; support for the two additional drives can only be implemented with two external Serial ATA ports enabled through a SATALite PHY.

Benefits of VIA K8T890

VIA Flex Express Architecture
The unique VIA Flex Express Architecture has been designed to allow the industry’s most flexible implementations of core-logic chipsets supporting PCI Express. The VIA Flex Express architecture allows multiple device configurations, supporting up to five PCI Express devices across 20 PCI Express lanes with an amazing combined bandwidth of 5GB/s.

Advanced PCI Express Peripheral Support
VIA Flex Express Architecture enables connection of up to 4 high bandwidth PCI Express x1 peripheral devices directly through the North Bridge of the K8T890 chipset, ensuring low latency and wide memory access, as well as freeing up I/O bandwidth in the chipset’s South Bridge, which increasingly deals with the heavy bandwidth requirements of multiple HDDs, optical drives and USB/1394 devices.

Asynchronous Bus Architecture
The VIA K8T890’s asynchronous bus architecture enables power users to fully optimize their system settings for the ultimate PC gaming and entertainment experience, while maintaining platform stability.

Ultra V-Link Bus
Delivering data throughput speeds of up to 1066 MB/s from the VIA VT8237R Plus South Bridge to the VIA K8T890 North Bridge, the Ultra V-Link interface delivers the necessary bandwidth and low latency required by today's increasingly demanding multimedia applications.

VIA Modular Architecture Platform
The VIA K8T890 is part of VIA's unique Modular Architecture Platform (V-MAP), which minimizes design times and time-to-market for motherboard partners through a flexible, pin-compatible design approach for VIA core-logic solutions. Motherboard partners are able to cover multiple market segments with fewer design resources, and also benefit from a single unified driver base.

Native Serial ATA/RAID Support
The VIA VT8237R Plus South Bridge features a native Serial ATA/RAID controller, providing direct support for two 150MB/s Serial ATA devices, and an additional two (for a total of four SATA devices) in combination with the SATAlite™ interface. The integrated V-RAID controller supports native RAID 0, RAID 1, RAID 0+1 and JBOD, ensuring optimum data integrity and system performance, while the user-friendly V-RAID software interface enables easy disk array configuration and management.

VIA Vinyl Multichannel Audio Suite
Delivering rich, warm surround sound at resolutions as high as 24/96 through up to six or eight-channel outputs, the VIA Vinyl Audio and VIA Vinyl Gold Audio enable crisp, clear performance, representing the highest levels of audio quality in a mainstream integrated or onboard solution.

Unified VIA Hyperion 4in1 Drivers
VIA's unified approach to drivers has been established for eight generations of chipsets, allowing end users to benefit from seamless hardware and software compatibility.

Block Diagram

Key Features

» Supports full range of AMD AMD Athlon 64 / Athlon 64 FX / Opteron / Sempron processors (939, 940 & 754-pin)
» Advanced VIA Flex Express Architecture
» PCI Express x16 Graphics
» 4 PCI Express x1 high speed peripheral connections
» VIA Hyper8 Technology with 1GHz/16-bit (per direction) HyperTransport processor-to-chipset link
» Asynchronous bus architecture
» Ultra V-Link 1066 MB/sec high bandwidth North/South Bridge interconnect
» Support for VIA Vinyl Gold 8-Channel Audio Controller & integrated VIA Vinyl 6-channel Audio
» Serial ATA support for up to 4 devices
» Integrated V-RAID with RAID 0, RAID 1, RAID 0+1, and JBOD(SATA) support
» Parallel ATA133/100/66 support for up to 4 devices
» Support for up to 8 USB 2.0/USB 1.1 ports, UHCI compliant
» Support for VIA Velocity Gigabit Ethernet companion controller & Integrated 10/100 Fast Ethernet
» Integrated MC’97 Modem
» Advanced power management capabilities including ACPI/OnNow
» 933 BGA North Bridge
» 539-pin BGA South Bridge


VIA K8 Series chipset comparison chart / Download printer friendly .pdf version
VIA K8T890 press release
Catch the Flex Express!
VIA's implementation of PCI express. » Learn more ...
Hyper8™ Technology
Achieving the full performance potential of the chipset. » Learn more ...
First Reviews
See how the media rates the VIA K8T890 chipset. » Learn more...
VIA K8T890 image kit

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