Atom N450 vs Mobile Sempron SI-40
Aggregate performance score
Mobile Sempron SI-40 outperforms Atom N450 by an impressive 54% based on our aggregate benchmark results.
Primary details
Comparing Mobile Sempron SI-40 and Atom N450 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3216 | 3334 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | AMD Mobile Sempron | Intel Atom |
| Power efficiency | 0.76 | 2.05 |
| Architecture codename | Sable (2008−2009) | Pinetrail (2009−2011) |
| Release date | 4 July 2008 (16 years ago) | 21 December 2009 (14 years ago) |
| Launch price (MSRP) | no data | $64 |
Detailed specifications
Mobile Sempron SI-40 and Atom N450 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 | 2 GHz | 1.67 GHz |
| Bus rate | 1800 MHz | 533 MHz |
| L1 cache | no data | 56 KB (per core) |
| L2 cache | 512 KB | 512 KB (per core) |
| L3 cache | no data | 0 KB |
| Chip lithography | 65 nm | 45 nm |
| Die size | no data | 66 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Number of transistors | no data | 123 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Mobile Sempron SI-40 and Atom N450 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 | no data | 1 |
| Socket | S1g2 | FCBGA559 |
| Power consumption (TDP) | 25 Watt | 5.5 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Mobile Sempron SI-40 and Atom N450. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 65 nm, 1.075 - 1.125V | 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
Mobile Sempron SI-40 and Atom N450 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 Mobile Sempron SI-40 and Atom N450 are enumerated here.
| VT-d | no data | - |
| VT-x | no data | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Mobile Sempron SI-40 and Atom N450. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR2 |
| 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 | On certain motherboards (Chipset feature) |
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.
3DMark06 CPU
3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.
Pros & cons summary
| Performance score | 0.20 | 0.13 |
| Recency | 4 July 2008 | 21 December 2009 |
| Threads | 1 | 2 |
| Chip lithography | 65 nm | 45 nm |
| Power consumption (TDP) | 25 Watt | 5 Watt |
Mobile Sempron SI-40 has a 53.8% higher aggregate performance score.
Atom N450, on the other hand, has an age advantage of 1 year, 100% more threads, a 44.4% more advanced lithography process, and 400% lower power consumption.
The Mobile Sempron SI-40 is our recommended choice as it beats the Atom N450 in performance tests.
Should you still have questions on choice between Mobile Sempron SI-40 and Atom N450, ask them in Comments section, and we shall answer.
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