AMD Athlon XP 2600/2400+ - Introducing Thoroughbred Revision B

A Modified Rating System

Many recognized a basic flaw with AMD's Athlon XP modeling system in that the model numbers increased at a quicker rate than the actual clock speeds of the chips did. For every 66MHz increase in clock speed, there was a 100 point increase in model number. Based on the old method, an Athlon XP 2400+ would be clocked at 1.93GHz and an Athlon XP 2600+ would weigh in at 2.06GHz; as you can guess, this isn't the case with these two CPUs.

Click to Enlarge

Click to Enlarge

The Athlon XP 2600+ (left) comes clocked at 2.13GHz, while the Athlon XP 2400+ (right) runs at an even 2.0GHz. You'll notice that the model numbers are shifted by 66MHz, presumably to compensate for the flaw we mentioned above.