Ultra 7 155U vs Pentium III 866
Primary details
Comparing Pentium III 866 and Core Ultra 7 155U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 731 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Meteor Lake-U |
| Power efficiency | no data | 66.63 |
| Architecture codename | Coppermine T (2000) | Meteor Lake-P (2023) |
| Release date | 20 March 2000 (24 years ago) | 14 December 2023 (less than a year ago) |
| Launch price (MSRP) | no data | $490 |
Detailed specifications
Pentium III 866 and Core Ultra 7 155U 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) | 12 (Dodeca-Core) |
| Threads | 1 | 14 |
| Base clock speed | no data | 1.7 GHz |
| Boost clock speed | 0.87 GHz | 4.8 GHz |
| L1 cache | 32 KB | 112 KB (per core) |
| L2 cache | 256 KB | 2 MB (per core) |
| L3 cache | 0 KB | 12 MB (shared) |
| Chip lithography | 180 nm | Intel 4 nm |
| Die size | 106 mm2 | no data |
| Maximum core temperature | no data | 110 °C |
| Maximum case temperature (TCase) | 80 °C | no data |
| Number of transistors | 28 million | no data |
| 64 bit support | - | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Pentium III 866 and Core Ultra 7 155U 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 |
| Socket | 370 | FCBGA2049 |
| Power consumption (TDP) | 27 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium III 866 and Core Ultra 7 155U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| Hyper-Threading Technology | no data | + |
| TSX | - | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Turbo Boost Max 3.0 | no data | - |
| Deep Learning Boost | - | + |
| Supported AI Software Frameworks | - | OpenVINO™, WindowsML, ONNX RT |
Security technologies
Pentium III 866 and Core Ultra 7 155U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium III 866 and Core Ultra 7 155U 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 Core Ultra 7 155U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5 |
| Maximum memory size | no data | 96 GB |
| Max memory channels | no data | 2 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | Intel® Graphics |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 1.95 GHz |
Graphics interfaces
Available interfaces and connections of Pentium III 866 and Core Ultra 7 155U integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Pentium III 866 and Core Ultra 7 155U integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 4096 x 2304 @ 60Hz (HDMI 2.1 TMDS) 7680 x 4320 @ 60Hz (HDMI2.1 FRL) |
| Max resolution over eDP | no data | 3840x2400 @ 120Hz |
| Max resolution over DisplayPort | no data | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by Pentium III 866 and Core Ultra 7 155U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12.2 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Pentium III 866 and Core Ultra 7 155U.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 12 |
| PCI support | no data | 4.0 |
Pros & cons summary
| Recency | 20 March 2000 | 14 December 2023 |
| Physical cores | 1 | 12 |
| Threads | 1 | 14 |
| Power consumption (TDP) | 27 Watt | 15 Watt |
Ultra 7 155U has an age advantage of 23 years, 1100% more physical cores and 1300% more threads, and 80% lower power consumption.
We couldn't decide between Pentium III 866 and Core Ultra 7 155U. We've got no test results to judge.
Note that Pentium III 866 is a desktop processor while Core Ultra 7 155U is a notebook one.
Should you still have questions on choice between Pentium III 866 and Core Ultra 7 155U, ask them in Comments section, and we shall answer.
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