First up we have the ZD Winbench CPUMark and FPUMark benchmarks. CPUMark tests the integer processing of a given CPU and the performance data suggests that the overclocked Celerons manage to keep up quite well.
The Celeron 900 tops the list, just squeaking by the Pentium III 700. Both the Celeron 850 and 855 finish ahead of the Pentium III 650, as do the Celeron 810 and 808 when compared to the Pentium III 600. Somewhat surprisingly, the raw 875 MHz power of the overclocked Celeron 700 is negated by its low 83 MHz FSB and finishes well back in the pack. Note that the Celerons at their standard clock speed cannot even surpass the Pentium III 500 in this test.