The 24/7 setting I want to run is 445 FSB, 9x multi and 266 strap giving 1116MHz ram speed.

I have tried all multi's from 6 to 9, but I have not set the strap manually, but I have tried 1:1, 4:5 etc memory dividers by selecting various ram speeds with strap set to AUTO (which should be changing the strap depending on what ram speed I have selected) and it still does it all the time - no matter what I set it refuses to reboot.

I could try selecting the strap manually but I doubt that will change anything.