Supported operating system:

Windows Vista 64-bit
Windows 7 64-bit

Release note:
Realtek ALC861/ALC880/ALC882/ALC883/ALC885/ALC887/ALC888/ALC889/ALC890/ALC260/ALC262/ALC268/ALC272/ALC273/ALC662/ALC663/ALC665 HD Audio version 2.56 driver for Vista-64/Win7-64 released on 5th Jan 2011.

Supported Devices:
Realtek High Definition Audio