Atom N455 vs Pentium III 1400
Aggregate performance score
Primary details
Comparing Pentium III 1400 and Atom N455 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3362 | 3352 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | Intel Atom |
| Power efficiency | 0.37 | 1.62 |
| Architecture codename | Tualatin (2000−2002) | Pinetrail (2009−2011) |
| Release date | December 2001 (23 years ago) | 1 June 2010 (14 years ago) |
| Launch price (MSRP) | no data | $64 |
Detailed specifications
Pentium III 1400 and Atom N455 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 | 2 |
| Base clock speed | no data | 1.66 GHz |
| Boost clock speed | 1.4 GHz | 1.67 GHz |
| Bus rate | no data | 533 MHz |
| L1 cache | 8 KB | 64 KB (per core) |
| L2 cache | 256 KB | 512K (per core) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 130 nm | 45 nm |
| Die size | 80 mm2 | 66 mm2 |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 69 °C | no data |
| Number of transistors | 44 million | 123 million |
| 64 bit support | - | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Pentium III 1400 and Atom N455 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 | 370 | FCBGA559 |
| Power consumption (TDP) | 31 Watt | 6.5 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium III 1400 and Atom N455. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE2, Intel® SSE3, Intel® SSSE3 |
| Enhanced SpeedStep (EIST) | no data | + |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | no data | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | no data | - |
Security technologies
Pentium III 1400 and Atom N455 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium III 1400 and Atom N455 are enumerated here.
| VT-d | no data | - |
| VT-x | no data | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium III 1400 and Atom N455. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR3 |
| Maximum memory size | no data | 2 GB |
| Max memory channels | no data | 1 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel GMA 3150 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Threads | 1 | 2 |
| Chip lithography | 130 nm | 45 nm |
| Power consumption (TDP) | 31 Watt | 6 Watt |
Atom N455 has 100% more threads, a 188.9% more advanced lithography process, and 416.7% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between Pentium III 1400 and Atom N455.
Note that Pentium III 1400 is a desktop processor while Atom N455 is a notebook one.
Should you still have questions on choice between Pentium III 1400 and Atom N455, ask them in Comments section, and we shall answer.
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