The Pentium III is essentially a Pentium II processor, with the same 512KB off-chip secondary cache and 100-MHz system bus.

CNN: Graphics applications scream on Intel Pentium III

When the K7's on-chip 128KB L1 cache becomes too small, the K7 will call on the 200-MHz EV6 bus developed for Digital's Alpha processors.

CNN: AMD's K7: Better than Intel's best processor?