Ryzen 7 5800X vs Pentium III 866

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Primary details

Comparing Pentium III 866 and Ryzen 7 5800X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot rated352
Place by popularitynot in top-10072
Cost-effectiveness evaluationno data24.56
Market segmentDesktop processorDesktop processor
Seriesno dataAMD Ryzen 7
Power efficiencyno data15.81
Architecture codenameCoppermine T (2000)Vermeer (Zen 3) (2020−2022)
Release date20 March 2000 (24 years ago)8 October 2020 (4 years ago)
Launch price (MSRP)no data$449

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Pentium III 866 and Ryzen 7 5800X 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)8 (Octa-Core)
Threads116
Base clock speedno data3.8 GHz
Boost clock speed0.87 GHz4.7 GHz
Multiplierno data38
L1 cache32 KB512 KB
L2 cache256 KB4 MB
L3 cache0 KB32 MB
Chip lithography180 nm7 nm, 12 nm
Die size106 mm22 x 80.7 sq. mm; I/O = 125 mm2
Maximum core temperatureno data90 °C
Maximum case temperature (TCase)80 °C95 °C
Number of transistors28 millionno data
64 bit support-+
Windows 11 compatibility-+
Unlocked multiplier-+

Compatibility

Information on Pentium III 866 and Ryzen 7 5800X 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 configuration21
Socket370AM4
Power consumption (TDP)27 Watt105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium III 866 and Ryzen 7 5800X. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataMMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, AES, AVX, AVX2, FMA3, SHA
AES-NI-+
AVX-+
Precision Boost 2no data+

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium III 866 and Ryzen 7 5800X are enumerated here.

AMD-V-+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium III 866 and Ryzen 7 5800X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesno dataDDR4
Maximum memory sizeno data128 GB
Max memory channelsno data2
Maximum memory bandwidthno data51.196 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)-

Peripherals

Specifications and connection of peripherals supported by Pentium III 866 and Ryzen 7 5800X.

PCIe versionno data4.0

Pros & cons summary


Recency 20 March 2000 8 October 2020
Physical cores 1 8
Threads 1 16
Chip lithography 180 nm 7 nm
Power consumption (TDP) 27 Watt 105 Watt

Pentium III 866 has 288.9% lower power consumption.

Ryzen 7 5800X, on the other hand, has an age advantage of 20 years, 700% more physical cores and 1500% more threads, and a 2471.4% more advanced lithography process.

We couldn't decide between Pentium III 866 and Ryzen 7 5800X. We've got no test results to judge.


Should you still have questions on choice between Pentium III 866 and Ryzen 7 5800X, ask them in Comments section, and we shall answer.

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Intel Pentium III  866
Pentium III 866
AMD Ryzen 7 5800X
Ryzen 7 5800X

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Community ratings

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