Pentium III 866 vs Pentium 4 1.3
Primary details
Comparing Pentium 4 1.3 and Pentium III 866 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Architecture codename | Willamette (2000−2001) | Coppermine T (2000) |
| Release date | January 2001 (23 years ago) | 20 March 2000 (24 years ago) |
Detailed specifications
Pentium 4 1.3 and Pentium III 866 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 cores | 1 (Single-Core) | 1 (Single-Core) |
| Threads | 1 | 1 |
| Boost clock speed | 1.3 GHz | 0.87 GHz |
| L1 cache | 8 KB | 32 KB |
| L2 cache | 256 KB | 256 KB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 180 nm | 180 nm |
| Die size | 217 mm2 | 106 mm2 |
| Maximum case temperature (TCase) | 70 °C | 80 °C |
| Number of transistors | 42 million | 28 million |
| 64 bit support | - | - |
| Windows 11 compatibility | - | - |
Compatibility
Information on Pentium 4 1.3 and Pentium III 866 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 configuration | 1 | 2 |
| Socket | 478 | 370 |
| Power consumption (TDP) | 52 Watt | 27 Watt |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium 4 1.3 and Pentium III 866. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | On certain motherboards (Chipset feature) |
Pros & cons summary
| Power consumption (TDP) | 52 Watt | 27 Watt |
Pentium III 866 has 92.6% lower power consumption.
We couldn't decide between Pentium 4 1.3 and Pentium III 866. We've got no test results to judge.
Should you still have questions on choice between Pentium 4 1.3 and Pentium III 866, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
