I have an Athlon XP processor that isn't running at the same speed as it's rated for (for instance, an 1800+ is not running at 1800MHz).

This is normal. The "speeds" listed on AthlonXP processors are actually "performance ratings", not the actual speeds of the processors. The speeds of the Athlon XP line is as follows:

* 3200+ = 2.2GHz
* 3000+ (400 MHz FSB) = 2.1GHz
* 3000+ (333 MHz FSB) = 2.167GHz
* 2800+ (Barton 333 MHz FSB) = 2.083GHz
* 2800+ = 2.25GHz
* 2700+ = 2.17GHz
* 2600+ (333 MHz FSB) = 2.08GHz
* 2600+ (266 MHz FSB) = 2.13GHz
* 2500+ (Barton) = 1.83GHz
* 2400+ = 2.0GHz
* 2200+ = 1.8GHz
* 2100+ = 1.73GHz
* 2000+ = 1.67GHz
* 1900+ = 1.6GHz
* 1800+ = 1.53GHz
* 1700+ = 1.47GHz
* 1600+ = 1.4GHz
* 1500+ = 1.33GHz
Posted By Gremelin Posted on October 1st, 2015

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