Did more testing with P4Tool, this time benchmarking the low end of performance with cache disabled.

First chart is using the 17x multiplier for the Pentium 4, second chart is with 12x multiplier. JEMM386 and HIMEMX was used for these benchmarks. For comparison, I included benchmarks from my 486 DX-33 and 386 DX-40 systems.

With just cache disabled, it performs like a mid-range 486. At the lowest level of performance with 12x multiplier, DS+BTS option, and cache fully disabled, the Pentium 4 is about the level of a 386 DX-40.

With cache disabled combined with the multiplier and DS/DS+BTS throttling options, the Cedar Mill P4 nicely covers a range of speeds from fast 386 to low/mid-range 486.