Mobile Sempron SI-42 vs i7-940XM
Aggregate performance score
Core i7-940XM outperforms Mobile Sempron SI-42 by a whopping 562% based on our aggregate benchmark results.
Primary details
Comparing Core i7-940XM and Mobile Sempron SI-42 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2228 | 3219 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | AMD Mobile Sempron |
| Power efficiency | 2.39 | 0.79 |
| Architecture codename | Clarksfield (2009−2010) | Sable (2008−2009) |
| Release date | 20 June 2010 (14 years ago) | 1 September 2009 (15 years ago) |
| Launch price (MSRP) | $1,096 | no data |
Detailed specifications
Core i7-940XM and Mobile Sempron SI-42 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 | 4 (Quad-Core) | 1 (Single-Core) |
| Threads | 8 | 1 |
| Base clock speed | 2.13 GHz | no data |
| Boost clock speed | 3.33 GHz | 2.1 GHz |
| Bus rate | 2500 MHz | 1800 MHz |
| L1 cache | 64 KB (per core) | 128 KB |
| L2 cache | 256 KB (per core) | 512 KB |
| L3 cache | 8 MB (shared) | no data |
| Chip lithography | 45 nm | 65 nm |
| Die size | 296 mm2 | no data |
| Maximum core temperature | 100 °C | 100 °C |
| Number of transistors | 774 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i7-940XM and Mobile Sempron SI-42 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 | no data |
| Socket | FCPGA988,PGA988 | S1g2 |
| Power consumption (TDP) | 55 Watt | 25 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-940XM and Mobile Sempron SI-42. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | 65 nm, 1.075 - 1.125 |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | + | no data |
| Hyper-Threading Technology | + | no data |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Demand Based Switching | - | no data |
| PAE | 36 Bit | no data |
Security technologies
Core i7-940XM and Mobile Sempron SI-42 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 Core i7-940XM and Mobile Sempron SI-42 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 Core i7-940XM and Mobile Sempron SI-42. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1066, DDR3-1333 | no data |
| Maximum memory size | 8 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 21 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | None | no data |
Peripherals
Specifications and connection of peripherals supported by Core i7-940XM and Mobile Sempron SI-42.
| PCIe version | 2 | no data |
| PCI Express lanes | 16 | no data |
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.
wPrime 32
wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.
Pros & cons summary
| Performance score | 1.39 | 0.21 |
| Recency | 20 June 2010 | 1 September 2009 |
| Physical cores | 4 | 1 |
| Threads | 8 | 1 |
| Chip lithography | 45 nm | 65 nm |
| Power consumption (TDP) | 55 Watt | 25 Watt |
i7-940XM has a 561.9% higher aggregate performance score, an age advantage of 9 months, 300% more physical cores and 700% more threads, and a 44.4% more advanced lithography process.
Mobile Sempron SI-42, on the other hand, has 120% lower power consumption.
The Core i7-940XM is our recommended choice as it beats the Mobile Sempron SI-42 in performance tests.
Should you still have questions on choice between Core i7-940XM and Mobile Sempron SI-42, ask them in Comments section, and we shall answer.
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