Monday, November 5, 2012

Dell Optiplex 780 noise after upgrading to Windows 7

I just finished upgrading my Dell Optiplex 780 to Windows 7 64-bit.  The tower was producing a very irritating high-pitched noise after this upgrade.  After a bit of searching, I found this discussion that seemed to match my problem:

I tested the BIOS setting change for C State Control suggested by carl.hobbs and petewitt.  It solved the problem instantly.