To answer my own question... The SC430 does support SpeedStep and there is a corresponding BIOS option. The issue I had was that my Pentium D was a B1 revision of the 920 which does not support SpeedStep - later revisions do. I dropped in a 940 revision C1 (SL95X) and the SpeedStep option appeared in the BIOS. Thanks Wikipedia: [URL] [URL]
I have a PowerEdge SC430 with a Pentium D 920 processor. I was expecting to see a SpeedStep option in the the BIOS but no dice. There is an option to enable the processor virtualisation features but nothing for SpeedStep. Has anyone got SpeedStep working on an SC430? It is supported by the processor and, according to Dell, by the BIOS (version A04). Any ideas gratefully received. My OS is Centos 6.2. Jonathan.
SpeedStep on an SC430 with Pentium D 920 - anyone got it working?