This may interest some people with the R5x and T4x laptops. There's a new embedded controller on IBM's website. http://www-306.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-50279 The readme says the following: <3.03 - 3.03 (1RHT70WW)> NOTE: This version of Embedded Controller Program will only work with BIOS Version 3.06f (or higher). - (Fix) Reduced Fan noise in some models. Enjoy, Joel