AMD Geode LX 900
The AMD Geode LX is a x86 CPU for embedded systems and thin clients. They have a very low TDP (5.1W for this model) with integrated graphics. The Geode LX is the successor of the Geode GX that was based on the MediaGX core made by Cyrix.
I don't have a way to benchmark this CPU but performance will be very low. I guess it would be in the ballpark of a 600MHz 486-class CPU.
The Geode GX and Geode LX should not be compared with the Geode NX. The latter is based on AMD's own Thoroughbred core and thus performs very well.
Pentium D 925 (3 GHz)