However this time things are a little different. Sometimes I forget that AMD also competes in the supreme value segment and sometimes not everyone needs the raw power of an AthlonXP. For those people, AMD create the Duron. As you might well know, AMD introduced something it calls Quantispeed for the jump to the AthlonXP. Quantispeed is a set of core enhancements over the old Thunderbird core that makes the AthlonXP faster than an equally clocked Thunderbird.