Core i9-12900KF vs Ryzen 9 3900X
Aggregate performance score
Core i9-12900KF outperforms Ryzen 9 3900X by a significant 26% based on our aggregated benchmark results.
Primary details
Comparing Ryzen 9 3900X and Core i9-12900KF processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 228 | 159 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 36.90 | 54.55 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 9 | Intel Core i9 |
| Architecture codename | Matisse (Zen 2) (2019−2020) | Alder Lake, Golden Cove, Gracemont (2021) |
| Release date | 7 July 2019 (4 years ago) | 4 November 2021 (2 years ago) |
| Launch price (MSRP) | $499 | $564 |
| Current price | $381 (0.8x MSRP) | $475 (0.8x MSRP) |
Cost-effectiveness evaluation
Performance per price, higher is better.
i9-12900KF has 48% better value for money than Ryzen 9 3900X.
Detailed specifications
Ryzen 9 3900X 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 | 12 (Dodeca-Core) | 16 (Hexadeca-Core) |
| Threads | 24 | 24 |
| Base clock speed | 3.8 GHz | 3.2 GHz |
| Boost clock speed | 4.6 GHz | 5.2 GHz |
| Bus support | no data | 8 × 16 GT/s |
| 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 | Intel 7 nm |
| Die size | no data | 215.25 mm220.5 mm × 10.5 mm |
| Maximum core temperature | 95 °C | 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 | Yes | Yes |
Compatibility
Information on Ryzen 9 3900X 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) | 125 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3900X and Core i9-12900KF. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | 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 | no data | + |
| Turbo Boost Max 3.0 | no data | + |
| Status | no data | Launched |
Security technologies
Ryzen 9 3900X 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 3900X and Core i9-12900KF are enumerated here.
| AMD-V | + | no data |
| 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 3900X 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 | 2 | 2 |
| Maximum memory bandwidth | 51.196 GB/s | 76.8 GB/s |
| ECC memory support | - | no data |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 3900X 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. 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.
Core i9-12900KF outperforms Ryzen 9 3900X by 26% based on our aggregated benchmark results.
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.
Benchmark coverage: 68%
Core i9-12900KF outperforms Ryzen 9 3900X by 26% in Passmark.
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.
Benchmark coverage: 42%
Core i9-12900KF outperforms Ryzen 9 3900X by 50% in GeekBench 5 Single-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.
Benchmark coverage: 42%
Core i9-12900KF outperforms Ryzen 9 3900X by 50% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 21.11 | 26.59 |
| Recency | 7 July 2019 | 4 November 2021 |
| Physical cores | 12 | 16 |
| Cost | $499 | $564 |
The Core i9-12900KF is our recommended choice as it beats the Ryzen 9 3900X in performance tests.
Should you still have questions on choice between Ryzen 9 3900X and Core i9-12900KF, ask them in Comments section, and we shall answer.
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