AMD Geode NX 1750
The name Geode was launched by National Semiconductor in 1999. That chip was derived from Cyrix' MediaGX. AMD bought the Geode in 2003 and continued with the Geode GX, LX and NX. The first two are Cyrix-designs and the latter is an Athlon XP.
This Geode NX 1750 uses a Thoroughbred core like many desktop and mobile Athlon XP's did. The cores on the Geode NX run with a lower core voltage, however. Because the Geode NX has one of the finer chips in quality they usually overclock quite good. This CPU does it's job quite well but not as good as my trusty (and darn good) Athlon XP 1800+ 'Thoroughbred' which is about 2,5 years older.
To use the Geode NX you need a suitable motherboard. I ran it on the SiS745-based ECS K7S6A. In case you want to run a Geode NX be sure to Google for compatible motherboards. It's most likely you have to use a SiS or VIA chipset. nForce2 tends to be more difficult.