I currently working on a cutomer upgrade program, and I have upgrade 3
Dell 2650 servers from 5.1.7 to 6.5.5 everything has work fine, but when I
do a 'speed' or 'display processors' or even 'cpucheck' it now display
sdouble the amount of processors.

I haven't come across this before on other installations I have done.

Has anyone got any ideas why the OS would now show this?