i9-12900KF vs Ryzen 9 3950X
Aggregate performance score
Core i9-12900KF outperforms Ryzen 9 3950X by a small 6% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 246 | 231 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 17.67 | 37.09 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 9 | Intel Core i9 |
| Power efficiency | 22.07 | 19.70 |
| Designer | AMD | Intel |
| Manufacturer | TSMC | Intel |
| Architecture codename | Matisse (Zen 2) (2019−2020) | Alder Lake, Golden Cove, Gracemont (2021) |
| Release date | 14 November 2019 (5 years ago) | 4 November 2021 (3 years ago) |
| Launch price (MSRP) | $799 | $564 |
Cost-effectiveness evaluation
Performance per price, higher is better.
i9-12900KF has 110% better value for money than Ryzen 9 3950X.
Performance to price scatter graph
Detailed specifications
Ryzen 9 3950X 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 | 16 (Hexadeca-Core) | 16 (Hexadeca-Core) |
| Performance-cores | no data | 8 |
| Efficient-cores | no data | 8 |
| Threads | 32 | 24 |
| Base clock speed | 3.5 GHz | 3.2 GHz |
| Boost clock speed | 4.7 GHz | 5.2 GHz |
| Bus type | no data | DMI 4.0 |
| Bus rate | no data | 8 × 16 GT/s |
| Multiplier | no data | 32 |
| L1 cache | 96K (per core) | 80K (per core) |
| L2 cache | 512K (per core) | 1.25 MB (per core) |
| L3 cache | 64 MB | 30 MB (shared) |
| Chip lithography | 7 nm, 12 nm | Intel 7 nm |
| Die size | 2 x 72 mm + 125 mm (IO-Die) mm2 | 215.25 mm2 |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 19,200 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | + | + |
Compatibility
Information on Ryzen 9 3950X 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 | 1 (Uniprocessor) | 1 |
| Socket | AM4 | FCLGA1700 |
| Power consumption (TDP) | 105 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3950X and Core i9-12900KF. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2 | 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 | + |
| Precision Boost 2 | + | no data |
| Deep Learning Boost | - | + |
Security technologies
Ryzen 9 3950X 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 Ryzen 9 3950X and Core i9-12900KF are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3950X and Core i9-12900KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | DDR5-4800, DDR4-3200 |
| Maximum memory size | 128 GB | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | 51.196 GB/s | 76.805 GB/s |
| ECC memory support | + | - |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 3950X and Core i9-12900KF.
| PCIe version | no data | 5.0 and 4.0 |
| PCI Express lanes | no data | 20 |
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.
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. Other than that, Passmark measures multi-core performance.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Pros & cons summary
| Performance score | 24.04 | 25.54 |
| Recency | 14 November 2019 | 4 November 2021 |
| Threads | 32 | 24 |
| Power consumption (TDP) | 105 Watt | 125 Watt |
Ryzen 9 3950X has 33.3% more threads, and 19% lower power consumption.
i9-12900KF, on the other hand, has a 6.2% higher aggregate performance score, and an age advantage of 1 year.
Given the minimal performance differences, no clear winner can be declared between AMD Ryzen 9 3950X and Intel Core i9-12900KF.
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