i9-12900KF vs Mobile Sempron SI-42
Primary details
Comparing Mobile Sempron SI-42 and Core i9-12900KF processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 186 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 37.25 |
| Market segment | Laptop | Desktop processor |
| Series | AMD Mobile Sempron | Intel Core i9 |
| Power efficiency | no data | 19.60 |
| Architecture codename | Sable (2008−2009) | Alder Lake, Golden Cove, Gracemont (2021) |
| Release date | 1 September 2009 (15 years ago) | 27 October 2021 (3 years ago) |
| Launch price (MSRP) | no data | $564 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Mobile Sempron SI-42 and Core i9-12900KF 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) | 16 (Hexadeca-Core) |
| Threads | 1 | 24 |
| Base clock speed | no data | 3.2 GHz |
| Boost clock speed | 2.1 GHz | 5.2 GHz |
| Bus type | no data | DMI 4.0 |
| Bus rate | 1800 MHz | 8 × 16 GT/s |
| Multiplier | no data | 32 |
| L1 cache | 128 KB | 768 KB |
| L2 cache | 512 KB | 4 MB |
| L3 cache | no data | 6 MB |
| Chip lithography | 65 nm | Intel 7 nm |
| Die size | no data | 215.25 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Mobile Sempron SI-42 and Core i9-12900KF 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 | FCLGA1700 |
| Power consumption (TDP) | 25 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Mobile Sempron SI-42 and Core i9-12900KF. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 65 nm, 1.075 - 1.125 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | - | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Turbo Boost Max 3.0 | no data | + |
| Deep Learning Boost | - | + |
Security technologies
Mobile Sempron SI-42 and Core i9-12900KF technologies aimed at improving security, for example, by protecting against hacks.
| EDB | no data | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Mobile Sempron SI-42 and Core i9-12900KF 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 Mobile Sempron SI-42 and Core i9-12900KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5-4800, DDR4-3200 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 76.805 GB/s |
Peripherals
Specifications and connection of peripherals supported by Mobile Sempron SI-42 and Core i9-12900KF.
| PCIe version | no data | 5.0 and 4.0 |
| PCI Express lanes | no data | 20 |
Pros & cons summary
| Recency | 1 September 2009 | 27 October 2021 |
| Physical cores | 1 | 16 |
| Threads | 1 | 24 |
| Power consumption (TDP) | 25 Watt | 125 Watt |
Mobile Sempron SI-42 has 400% lower power consumption.
i9-12900KF, on the other hand, has an age advantage of 12 years, and 1500% more physical cores and 2300% more threads.
We couldn't decide between Mobile Sempron SI-42 and Core i9-12900KF. We've got no test results to judge.
Be aware that Mobile Sempron SI-42 is a notebook processor while Core i9-12900KF is a desktop one.
Should you still have questions on choice between Mobile Sempron SI-42 and Core i9-12900KF, 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.
