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SPECint_base2000 and SPECfp_base2000 measure the speed of a single task—either
an integer calculation or a floating-point calculation—executing on a single processor.
Each test measures how long the processor takes to complete the benchmark set of
single tasks relative to a SPEC-defined baseline score. SPECint_base2000 is composed
of eleven C and one C++ benchmark applications, including a chess program, a data
compression utility, and a place-and-route simulator. SPECfp_base2000 consists of six
Fortran-77, four Fortran-90, and four C benchmark applications, including shallow-
water modeling, neural-network simulation, and computational chemistry.
In single-processor tests, the Power Mac G5 completed the set of floating-point calculations
21 percent faster than the Pentium 4–based system and 30 percent faster than the Xeon-
based workstation, while it performed slightly below both systems when executing simple
integer calculations.
3
Power Mac G5
Dual 2GHz PowerPC G5
Dell Precision 650
Dual 3.06GHz Xeon
Dell Dimension 8300
3GHz Pentium 4
800
836
889
500 10000
500 10000
Power Mac G5
Dual 2GHz PowerPC G5
Dell Precision 650
Dual 3.06GHz Xeon
Dell Dimension 8300
3GHz Pentium 4
840
646
693
SPECint_base2000: Integer calculations
SPECfp_base2000: Floating-point calculations
SPEC score
12
White Paper
PowerPC G5
SPEC CPU2000: Single-Processor Speed