EPYC 7643 vs i9-9800X
Primary details
Comparing Core i9-9800X and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 39 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 6.37 |
| Market segment | Desktop processor | Server |
| Series | no data | AMD EPYC |
| Power efficiency | no data | 20.14 |
| Architecture codename | Skylake-X (2018) | Milan (2021−2023) |
| Release date | October 2018 (6 years ago) | 15 March 2021 (3 years ago) |
| Launch price (MSRP) | no data | $4,995 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i9-9800X and EPYC 7643 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 | 8 (Octa-Core) | 48 (Octatetraconta-Core) |
| Threads | 16 | 96 |
| Base clock speed | no data | 2.3 GHz |
| Boost clock speed | 3.8 GHz | 3.6 GHz |
| Multiplier | no data | 23 |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 1 MB (per core) | 512 KB (per core) |
| L3 cache | 16.5 MB (shared) | 256 MB (shared) |
| Chip lithography | 14 nm | 7 nm+ |
| Die size | no data | 8x 81 mm2 |
| Maximum case temperature (TCase) | 72 °C | no data |
| Number of transistors | no data | 33,200 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i9-9800X and EPYC 7643 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 | 2 |
| Socket | 2066 | SP3 |
| Power consumption (TDP) | 165 Watt | 225 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i9-9800X and EPYC 7643. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| TSX | + | - |
Security technologies
Core i9-9800X and EPYC 7643 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i9-9800X and EPYC 7643 are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i9-9800X and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | DDR4-3200 |
| Maximum memory size | no data | 4 TiB |
| Maximum memory bandwidth | no data | 204.795 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Core i9-9800X and EPYC 7643.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Physical cores | 8 | 48 |
| Threads | 16 | 96 |
| Chip lithography | 14 nm | 7 nm |
| Power consumption (TDP) | 165 Watt | 225 Watt |
i9-9800X has 36.4% lower power consumption.
EPYC 7643, on the other hand, has 500% more physical cores and 500% more threads, and a 100% more advanced lithography process.
We couldn't decide between Core i9-9800X and EPYC 7643. We've got no test results to judge.
Note that Core i9-9800X is a desktop processor while EPYC 7643 is a server/workstation one.
Should you still have questions on choice between Core i9-9800X and EPYC 7643, ask them in Comments section, and we shall answer.
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