Can I install Openserver 5.0.4 5.0.5 or 5.0.6 on a Pentium 4 based machine?

          Openserver 5.0.4 and 5.0.5 will not work with a Pentium 4 based
          system. To use a Pentium 4 processor you will need to upgrade to
          Openserver 5.0.6. You will also need to apply rs506a and oss648a 
          as these supplements provide the thermal throttle code which is
          essential to avoid permanent damage to the Pentium 4 processor.

With the introduction of the Pentium 4 processor thermal throttling was moved 
from a CPU function to a function of the operating system. Installing on an 
operating system less than described above could lead to permanent damage of 
the CPU or a highly unreliable machine.

     The supplements including installation instructions are available from:

          ftp://ftp.sco.com/pub/openserver5/rs506a
          ftp://ftp.sco.com/pub/openserver5/oss648a
          ftp://ftp.sco.com/pub/openserver5/oss648a.ltr

This information also applies to the Intel Xeon processors using the same 
NetBurst microarchitecture as the standard Pentium 4.

       See the urls listed below for references detailing the processor fixes,
       specifications and multi-processor support available:

        http://www.sco.com/support/docs/openserver/506/fixlist.html
        http://www.sco.com./products/openserver/System_Requirements.html

       For additional information visit following locations:

        http://www.intel.com/xeon/
        http://developer.intel.com/technology/itj/q12001/pdf/art_4.pdf
        http://www.sco.com/support/docs/openserver/506/fixlist.html
        http://www.sco.com./products/openserver/System_Requirements.html

         
          Technical Article 113341, "What problems are fixed in Release Supplement 506a for 
          SCO OpenServer Release 5.0.6?"

          Technical Article 118212, "What is Support Level Supplement (SLS) OSS648A, the
          Processor Supplement for OpenServer 5.0.6?"