ICOMP

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iCOMP is a benchmark developed by Intel to measure the performance of its processors, when architectural changes prevented a comparison based solely on clock frequency. iCOMP is an acronym for Intel Comparative Microprocessor Performance. However, this benchmark has not had the impact that Intel expected.

The type of computers you are trying to measure are personal computers and network servers based on Intel microprocessors.

ICOMP index

There were three revisions of the iCOMP index. Version 1.0 indicated performance against the 486SX 25, version 2.0 indicated performance against the Pentium 120, and version 3.0 indicated performance against the Pentium II 350MHz.

Name of CPU	Speed (MHz)	iCOMP 3.0	iCOMP 2.0	iCOMP 1.0
Pentium III	1000	3280
	933	3100
	866	2890
	800	2690
	750	2540
	700	2420
	650	2270
Pentium III E	600	2110
Pentium III	600	1930
	550	1780
	500	1650
	450	1500
Pentium II	450	1240	483
Pentium II	400	1130	440
Celeron	400	1011	394
Pentium II OverDrive	333	1001	387
Pentium II	350	1000	386
Pentium II	333	940	366
Pentium II OverDrive	300		351
Celeron	366	890	344
Pentium II	300		332
Celeron	333		318
Pentium II	266		303
Celeron A	300		296
Pentium II	233		267
Celeron	300		226
Pentium Pro 256K	200		220
Celeron	266		213
Pentium MMX	233		203
Pentium Pro 256K	180		197
Pentium Pro 512K	166		186
Pentium MMX	200		182
Pentium OverDrive MMX 200	200		181
Pentium Pro 256K	150		168
Pentium OverDrive MMX 180	180		163
Pentium MMX	166		160
Pentium OverDrive MMX 166	166		157
Pentium MMX	150		144
Pentium OverDrive MMX 150	150		144
Pentium	200		142
Pentium	166		127	1308
Pentium OverDrive	166		127	1308
Pentium OverDrive MMX 150	125		120
Pentium	150		114	1176
Pentium OverDrive	150		114	1176
Pentium	133		111	1110
Pentium OverDrive	125			1070
Pentium	120		100	1000
Pentium OverDrive	133		84	970
Pentium OverDrive	120		75	877
Pentium	100		90	815
	90		81	735
	75		67	610
Pentium OverDrive	83			581
Pentium	66			567
Pentium	60			510
Pentium OverDrive	63			443
Intel486 DX4	100			435
Intel486 DX4	75			319
Intel486 DX2	66			297
Intel486 DX	50			249
Intel486 DX2	50			231
Intel486 SX2	50			180
Intel486 DX	33			166
Intel486 SX	33			136
Intel486 DX	25			122
Intel486 SX	25			100
Intel486 SX	20			78
Intel386 DX	33			68
Intel486 SX	16			63
Intel386 DX	25			49
Intel386 SL	25			41
Intel386 SX	25			39
	20			32
	16			22

Results

Its result expresses the relative performance of Intel processors with respect to some Intel processor that is considered base (it changed with the different versions of iCOMP). To do this, it calculates the weighted geometric average of the different benchmarks that comprise it. In version 1.0 the Intel 486SX 25MHz processor had a score of 100, and the benchmarks that make it up are:

ZD(Ziff-Davis) Bench - 68%
16-bit Whetstone - 2%
SPECint92 - 25%
SPECfp92 - 5%

In version 2.0 the reference processor became the 120 MHz Pentium, and the benchmarks that comprise it are prepared to measure the performance of 32-bit processors. These are:

CPUmark32
Norton Utilities SI32
CINT95 and CFP95 of SPEC
Intel Media Benchmark.

These measures were chosen from a series of publicly available benchmarks. Among the reasons given for their choice we have that each one measures a special characteristic of the Intel architecture; They also use a mix of applications found in most systems today. By giving different weights to each one, Intel also establishes which of those characteristics are the most important for the applications of the moment.

Later, version 3.0 was released to the public, which was based on the 350 MHz Pentium II and again changed the mix that makes up the general benchmark.

Obviously, since it is a benchmark defined by Intel itself, it responds to its own interests, in particular it is noted that the relationship between iCOMP scores always exceeds that of the clock. Furthermore, as its architecture changed, this benchmark changed so that it gave better results according to the new features it was incorporating.

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