Pentium III 500E vs Pentium III 866

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Primary details

Comparing Pentium III 866 and Pentium III 500E processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot ratednot rated
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
Architecture codenameCoppermine T (2000)Coppermine (1999−2001)
Release date20 March 2000 (24 years ago)25 October 1999 (25 years ago)
Launch price (MSRP)no data$239

Detailed specifications

Pentium III 866 and Pentium III 500E basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores1 (Single-Core)1 (Single-Core)
Threads11
Boost clock speed0.87 GHz0.5 GHz
L1 cache32 KB32 KB
L2 cache256 KB256 KB
L3 cache0 KBno data
Chip lithography180 nm180 nm
Die size106 mm2106 mm2
Maximum case temperature (TCase)80 °C85 °C
Number of transistors28 million28 million
64 bit support--
Windows 11 compatibility-no data

Compatibility

Information on Pentium III 866 and Pentium III 500E compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration22
Socket370370
Power consumption (TDP)27 Watt13 Watt

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)On certain motherboards (Chipset feature)

Pros & cons summary


Recency 20 March 2000 25 October 1999
Power consumption (TDP) 27 Watt 13 Watt

Pentium III 866 has an age advantage of 4 months.

Pentium III 500E, on the other hand, has 107.7% lower power consumption.

We couldn't decide between Pentium III 866 and Pentium III 500E. We've got no test results to judge.


Should you still have questions on choice between Pentium III 866 and Pentium III 500E, ask them in Comments section, and we shall answer.

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Intel Pentium III  866
Pentium III 866
Intel Pentium III 500E
Pentium III 500E

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Community ratings

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