i9-12900KS vs EPYC 7643
Aggregate performance score
EPYC 7643 outperforms Core i9-12900KS by an impressive 73% based on our aggregate benchmark results.
Primary details
Comparing EPYC 7643 and Core i9-12900KS processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 38 | 177 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 6.71 | no data |
| Market segment | Server | Desktop processor |
| Series | AMD EPYC | no data |
| Power efficiency | 20.14 | 17.45 |
| Architecture codename | Milan (2021−2023) | Alder Lake-S (2022) |
| Release date | 12 January 2021 (3 years ago) | 5 April 2022 (2 years ago) |
| Launch price (MSRP) | $4,995 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
EPYC 7643 and Core i9-12900KS 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 | 48 (Octatetraconta-Core) | 16 (Hexadeca-Core) |
| Threads | 96 | 24 |
| Base clock speed | 2.3 GHz | 3.4 GHz |
| Boost clock speed | 3.6 GHz | 5.3 GHz |
| Multiplier | 23 | no data |
| L1 cache | 3 MB | 80K (per core) |
| L2 cache | 24 MB | 1.25 MB (per core) |
| L3 cache | 256 MB (shared) | 30 MB (shared) |
| Chip lithography | 7 nm+ | Intel 7 nm |
| Die size | 8x 81 mm2 | 215 mm2 |
| Maximum core temperature | no data | 90 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 33,200 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | - | + |
Compatibility
Information on EPYC 7643 and Core i9-12900KS 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 | 2 | 1 |
| Socket | SP3 | FCLGA1700 |
| Power consumption (TDP) | 225 Watt | 150 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7643 and Core i9-12900KS. 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 | + | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | - | + |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Turbo Boost Max 3.0 | no data | + |
| Deep Learning Boost | - | + |
Security technologies
EPYC 7643 and Core i9-12900KS technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| Secure Key | no data | + |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 7643 and Core i9-12900KS 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 EPYC 7643 and Core i9-12900KS. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR5-4800, DDR4-3200 |
| Maximum memory size | 4 TiB | 128 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | 204.795 GB/s | 76.8 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | Intel UHD Graphics 770 |
| Quick Sync Video | - | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 1.55 GHz |
| Execution Units | no data | 32 |
Graphics interfaces
Available interfaces and connections of EPYC 7643 and Core i9-12900KS integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by EPYC 7643 and Core i9-12900KS integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 4096 x 2160 @ 60Hz |
| Max resolution over eDP | no data | 5120 x 3200 @ 120Hz |
| Max resolution over DisplayPort | no data | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by EPYC 7643 and Core i9-12900KS integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by EPYC 7643 and Core i9-12900KS.
| PCIe version | 4.0 | 5.0 and 4.0 |
| PCI Express lanes | 128 | 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.
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.
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 | 47.88 | 27.66 |
| Recency | 12 January 2021 | 5 April 2022 |
| Physical cores | 48 | 16 |
| Threads | 96 | 24 |
| Power consumption (TDP) | 225 Watt | 150 Watt |
EPYC 7643 has a 73.1% higher aggregate performance score, and 200% more physical cores and 300% more threads.
i9-12900KS, on the other hand, has an age advantage of 1 year, and 50% lower power consumption.
The EPYC 7643 is our recommended choice as it beats the Core i9-12900KS in performance tests.
Be aware that EPYC 7643 is a server/workstation processor while Core i9-12900KS is a desktop one.
Should you still have questions on choice between EPYC 7643 and Core i9-12900KS, 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.
