Celeron 4205U vs Pentium III 866
Primary details
Comparing Pentium III 866 and Celeron 4205U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 2556 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Celeron |
| Power efficiency | no data | 5.43 |
| Architecture codename | Coppermine T (2000) | Whiskey Lake-U (2018−2019) |
| Release date | 20 March 2000 (24 years ago) | 23 January 2019 (5 years ago) |
| Launch price (MSRP) | no data | $107 |
Detailed specifications
Pentium III 866 and Celeron 4205U 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) | 2 (Dual-core) |
| Threads | 1 | 2 |
| Base clock speed | no data | 1.8 GHz |
| Boost clock speed | 0.87 GHz | 1.8 GHz |
| Bus type | no data | OPI |
| Bus rate | no data | 4 GT/s |
| Multiplier | no data | 18 |
| L1 cache | 32 KB | 64 KB (per core) |
| L2 cache | 256 KB | 256 KB (per core) |
| L3 cache | 0 KB | 2 MB (shared) |
| Chip lithography | 180 nm | 14 nm |
| Die size | 106 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 80 °C | no data |
| Number of transistors | 28 million | no data |
| 64 bit support | - | + |
| Windows 11 compatibility | - | + |
Compatibility
Information on Pentium III 866 and Celeron 4205U 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 | 2 | 1 (Uniprocessor) |
| Socket | 370 | FCBGA1528 |
| Power consumption (TDP) | 27 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium III 866 and Celeron 4205U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| My WiFi | no data | + |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | no data | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Smart Response | no data | + |
Security technologies
Pentium III 866 and Celeron 4205U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | no data | + |
| Secure Key | no data | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium III 866 and Celeron 4205U are enumerated here.
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium III 866 and Celeron 4205U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR3, DDR4 |
| Maximum memory size | no data | 64 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 38.397 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | Intel® UHD Graphics for 8th Generation Intel® Processors |
| Max video memory | no data | 32 GB |
| Quick Sync Video | - | + |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 900 MHz |
Graphics interfaces
Available interfaces and connections of Pentium III 866 and Celeron 4205U integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
Graphics image quality
Maximum display resolutions supported by Pentium III 866 and Celeron 4205U integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@24Hz |
| Max resolution over eDP | no data | 4096x2304@60Hz |
| Max resolution over DisplayPort | no data | 4096x2304@60Hz |
Graphics API support
APIs supported by Pentium III 866 and Celeron 4205U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Pentium III 866 and Celeron 4205U.
| PCIe version | no data | 2.0 |
| PCI Express lanes | no data | 12 |
Pros & cons summary
| Recency | 20 March 2000 | 23 January 2019 |
| Physical cores | 1 | 2 |
| Threads | 1 | 2 |
| Chip lithography | 180 nm | 14 nm |
| Power consumption (TDP) | 27 Watt | 15 Watt |
Celeron 4205U has an age advantage of 18 years, 100% more physical cores and 100% more threads, a 1185.7% more advanced lithography process, and 80% lower power consumption.
We couldn't decide between Pentium III 866 and Celeron 4205U. We've got no test results to judge.
Note that Pentium III 866 is a desktop processor while Celeron 4205U is a notebook one.
Should you still have questions on choice between Pentium III 866 and Celeron 4205U, ask them in Comments section, and we shall answer.
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