Straight from the AMD
FAQ:
What do the 2200+, 2100+, 2000+, 1900+, 1800+ and 1700+ numbers mean?
These are model numbers. AMD identifies the AMD Athlon XP processor using model numbers, as opposed to megahertz, such as the 2200+, 2100+, 2000+, 1900+, 1800+ and 1700+ versions. Model numbers are designed to communicate the relative application performance among the various AMD Athlon XP processors. The AMD Athlon XP processor 2200+ can outperform an Intel Pentium® 4 processor operating at 2.2GHz on a broad array of end-user applications.
AMD Athlon XP processor 2200+ operates at a frequency of 1.8GHz.
AMD Athlon XP processor 2100+ operates at a frequency of 1.73GHz.
AMD Athlon XP processor 2000+ operates at a frequency of 1.67GHz.
AMD Athlon XP processor 1900+ operates at a frequency of 1.6GHz.
AMD Athlon XP processor 1800+ operates at a frequency of 1.53GHz.
AMD Athlon XP processor 1700+ operates at a frequency of 1.47GHz.
Dit is natuurlijk AMD's lezing maar je kunt het gerust als richtlijn nemen
Just pick a dead end and chill out 'till you die.