Apple PowerPC G5 manual Spec CPU2000 Single-Processor Speed

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PowerPC G5

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.

SPEC CPU2000: Single-Processor Speed

SPECint_base2000: Integer calculations
Power Mac G5	800
Dual 2GHz PowerPC G5
Dell Precision 650		836
Dual 3.06GHz Xeon
Dell Dimension 8300			889
3GHz Pentium 4

0		500	1000
SPECfp_base2000: Floating-point calculations
Power Mac G5					840
Dual 2GHz PowerPC G5
Dell Precision 650			646
Dual 3.06GHz Xeon
Dell Dimension 8300				693
3GHz Pentium 4
0		500	1000
	SPEC score

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