PC Mark 04: CPU
Product Score Graph Difference Intel Pentium4 3.4GHz 5,224 +33% AMD Athlon64 3500+ 4,233 +8% Intel Pentium-M 2.0GHz 3,936

PC Mark 04: Memory
Product Score Graph Difference Intel Pentium4 3.4GHz 5,407 +70% AMD Athlon64 3500+ 5,402 +70% Intel Pentium-M 2.0GHz 3,178

PC Mark 04: Hard Disk
Product Score Graph Difference AMD Athlon64 3500+ 5,567 +28% Intel Pentium-M 2.0GHz 4,346 Intel Pentium4 3.4GHz 4,193 -4%

Sandra 04: RAM Floating
Product Score Graph Difference AMD Athlon64 3500+ 5,922 +122% Intel Pentium4 3.4GHz 4,970 +87% Intel Pentium-M 2.0GHz 2,662

Sandra 04: RAM Integer
Product Score Graph Difference AMD Athlon64 3500+ 5,982 +125% Intel Pentium4 3.4GHz 4,967 +87% Intel Pentium-M 2.0GHz 2,661

Pretty much whats expected here- the lower clocked 2.0GHz CPU with its single channel memory controller cant really show much in sythetic benchmarks.