Ultra 9 285T vs Mobile Pentium III 400
Primary details
Comparing Mobile Pentium III 400 and Core Ultra 9 285T 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 | Laptop | Desktop processor |
| Architecture codename | Coppermine (1999−2001) | Arrow Lake-S (2024−2025) |
| Release date | 25 October 1999 (25 years ago) | January 2025 |
| Launch price (MSRP) | $348 | no data |
Detailed specifications
Mobile Pentium III 400 and Core Ultra 9 285T 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) | 24 (Tetracosa-Core) |
| Threads | 1 | 24 |
| Base clock speed | no data | 1.4 GHz |
| Boost clock speed | 0.4 GHz | 5.4 GHz |
| L1 cache | 32 KB | 112 KB (per core) |
| L2 cache | 256 KB | 3 MB (per core) |
| L3 cache | no data | 36 MB (shared) |
| Chip lithography | 180 nm | 3 nm |
| Die size | 106 mm2 | 243 mm2 |
| Number of transistors | 28 million | 17,800 million |
| 64 bit support | - | + |
Compatibility
Information on Mobile Pentium III 400 and Core Ultra 9 285T 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 | 1 |
| Socket | Intel Micro-BGA2 | 1851 |
| Power consumption (TDP) | 10 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Mobile Pentium III 400 and Core Ultra 9 285T. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | no data | + |
| TSX | - | + |
Security technologies
Mobile Pentium III 400 and Core Ultra 9 285T technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Mobile Pentium III 400 and Core Ultra 9 285T are enumerated here.
| VT-d | no data | + |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Mobile Pentium III 400 and Core Ultra 9 285T. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5 Depends on motherboard |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | Arc Xe2 Graphics 64EU |
Peripherals
Specifications and connection of peripherals supported by Mobile Pentium III 400 and Core Ultra 9 285T.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 20 |
Pros & cons summary
| Physical cores | 1 | 24 |
| Threads | 1 | 24 |
| Chip lithography | 180 nm | 3 nm |
| Power consumption (TDP) | 10 Watt | 35 Watt |
Mobile Pentium III 400 has 250% lower power consumption.
Ultra 9 285T, on the other hand, has 2300% more physical cores and 2300% more threads, and a 5900% more advanced lithography process.
We couldn't decide between Mobile Pentium III 400 and Core Ultra 9 285T. We've got no test results to judge.
Be aware that Mobile Pentium III 400 is a notebook processor while Core Ultra 9 285T is a desktop one.
Should you still have questions on choice between Mobile Pentium III 400 and Core Ultra 9 285T, 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.
