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WHQL driver package for nForce 570 SLI, nForce 570 Ultra, nForce 550 motherboards.
Installation Notes:

Uninstall any existing nForce networking drivers prior to installing this package.
Windows XP users must install Service Pack 1, at a minimum, prior to attempting to install this package. Failure to do so will result in the inability to support USB 2.0.
Installation of DirectX 9.0 or higher is required in order to use NVMixer.

Windows XP/2000/64 Driver Versions:

Ethernet Driver (v55.21) "WHQL"
Network Management Tools (v55.23)
SMBus Driver (v4.52) "WHQL"
Installer (v5.05)
Win2K IDE SataRAID Driver (v6.66) "WHQL"
Win2K IDE SataIDE Driver (v6.66) "WHQL"
Win2K RAIDTOOL Application (v6.63)

9.16_nforce_winxp_international_whql.exe : Windows XP/2000

9.16_nforce_winxp64_international_whql.exe : Windows XP Professional x64