Technically this slot A model is the same as this socket A (462) Athlon 850. Both have the 'Thunderbird' core with 256KB on-die full speed L2 cache.

The 850MHz Slot A Athlon exists in two versions. One has the Thunderbird core, the other a Pluto core. The latter is like this Athlon 500 with 512KB off-die L2 cache. The 500MHz model has L2 cache on 1/2 of the core frequency and the 850MHz model has 1/3.