The definition of a CPU is the MAIN microprocessor in a computer which carries out the computers main intructions. Windows 98 can only see ONE MAIN CPU. Although your graphics card has a powerful microprocessor, the term CPU can not be used to describe it. This is because it doesn't carrie out your computers main intructions - it just carries out the graphical instructions. This is why nVidia started reffering to there graphics microprocessor as a GPU because its not CPU in the strict term of the word.