AMD Athlon XP
Model 6
The OPN part number on the chip starts with an "A" to indicate AMD Athlon XP Processor Model 6.
Athlon XP 1500+Athlon XP 1600+
Athlon XP 1700+
Athlon XP 1800+
Athlon XP 1900+
Athlon XP 2000+
Athlon XP 2100+
Model 8
The OPN part number on the chip begins with "AXD A" to indicate AMD Athlon™ XP Processor Model 8 with QuantiSpeed™ Architecture for Desktop Products.
Athlon XP 1600+Athlon XP 1700+
Athlon XP 1800+
Athlon XP 1900+
Athlon XP 2000+
Athlon XP 2100+
Athlon XP 2200+
Athlon XP 2400+
Athlon XP 2600+
Athlon XP 2700+
Model 10 with 512 Kbytes L2 Cache
The OPN part number on the chip begins with "AXD A" to indicate AMD Athlon™ XP Processor Model 10 with QuantiSpeed™ Architecture for Desktop Products.
Athlon XP 2500+Athlon XP 2600+
Athlon XP 2800+
Athlon XP 3000+ 400 FSB
Athlon XP 3000+ 333 FSB
Athlon XP 3200+
Model 10 with 256 Kbytes L2 Cache
The OPN part number on the chip begins with "AXD C", and the seventh group of part numbers should be a "3" to denote 256K of L2 cache.
Athlon XP 2000+Athlon XP 2200+
Athlon XP 2400+
Overclocking
I would not recommend overclocking these processors. Usually the BIOS defaults are good enough, as it always chooses the best settings automatically. If you change the BIOS settings to values your motherboard does not support, then your motherboard will not boot or go through the Power on Self Test (POST). To recover from this, one usually has to reset the CMOS settings using the reset jumper on the motherboard.
eBay / Cost
Usually eBay is the place where you can find used and new Athlon XP processors for sale, and since it is an old processor you can usually pick one up for around five pounds. If you have a slow model 6 processor, then the chances are high that your motherboard can be upgraded with a faster one. Some of the faster ones such as the Athlon XP 3000+ can work in most motherboards with bus speed s of 333 MHz or 400 MHz, and the performance is comparable to a 3 GHz Pentium 4. You can also run Windows 7 on the Athlon XP, however you will not be able to upgrade to Windows 10 which requires a modern processor. You will also not be able to run the latest version of Chrome. On the bright side, a streamlined Windows XP can be very fast and many people still use it today.