Jon, you're simply wrong. The original Pentium and Pentium Pro have 8K L1 dcache; the Pentium MMX and Pentium II/III have 16K L1 dcache. See http://cr.yp.to/hardware/x86.html for pointers to more information. ---D. J. Bernstein, Associate Professor, Department of Mathematics, Statistics, and Computer Science, University of Illinois at Chicago