Station Drivers posted version 8.0.0.1039 of the Intel Matrix Storage Drivers. Finally they got Write Cache working with it when running in AHCI mode!
http://translate.google.com/translate?u ... e&ie=UTF-8
Also see
http://www.abxzone.com/forums/f41/intel ... 11241.html
http://www.abxzone.com/forums/f41/new-i ... 06959.html