Sounds like you've been bitten by the hard drive swap temperature sensor monster. If the hard drive you install doesn't have a compatible connector for the temperature sensor included then the fans will run at full speed.
See the following : http://www.hardmac.com/news/2010/06/19/the-new-mac-mini-also-has-specific-sensors-on-the-hard-drive http://macs.about.com/od/faq1/f/upgrade-hard-drive-in-late-2009-imac.htm http://discussions.apple.com/message.jspa?messageID=10524593 What model of Mac is it in? My MacBook Pro 5.3 15" works fine with my crucial SSD. Sam providing affordable Apple & PC services Sam Mullen 07747 778022 http://www.macambulance.co.uk i...@macambulance.co.uk -- You received this message because you are subscribed to the Google Groups "Sussex Mac User Group" group. To post to this group, send an email to s...@googlegroups.com. To unsubscribe from this group, send email to smug+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/smug?hl=en-GB.