EPYC 7643: specs and benchmarks
Aggregate performance score
EPYC 7643 provides outstanding benchmark performance at 47.88% of a leader's which is a 96-core EPYC 9655P.
Summary
AMD started EPYC 7643 sales 15 March 2021 at a recommended price of $4,995. This is a Milan architecture desktop processor primarily aimed at professional systems. It has 48 cores and 96 threads, and is based on 7 nm+ manufacturing technology, with a maximum frequency of 3600 MHz and a locked multiplier.
Compatibility-wise, this is AMD Socket SP3 processor with a TDP of 225 Watt. It supports DDR4-3200 memory.
Primary details
EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and pricing.
| Place in the ranking | 39 | |
| Place by popularity | not in top-100 | |
| Cost-effectiveness evaluation | 6.37 | |
| Market segment | Server | |
| Series | AMD EPYC | |
| Power efficiency | 20.14 | of 100.00 (Core Ultra 7 164U) |
| Architecture codename | Milan (2021−2023) | |
| Release date | 15 March 2021 (3 years ago) | |
| Launch price (MSRP) | $4,995 | of 17,906 (Xeon Platinum 8280L) |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.
| Physical cores | 48 (Octatetraconta-Core) | |
| Threads | 96 | |
| Base clock speed | 2.3 GHz | of 4.7 GHz (Ryzen 9 7900X) |
| Boost clock speed | 3.6 GHz | of 6.2 GHz (Core i9-14900KS) |
| Multiplier | 23 | of 42 (Core i7-7700K) |
| L1 cache | 64 KB (per core) | of 80 KB (EPYC 9965) |
| L2 cache | 512 KB (per core) | of 2 MB (Xeon 6980P) |
| L3 cache | 256 MB (shared) | of 1152 MB (EPYC 9684X) |
| Chip lithography | 7 nm+ | of 3 nm (Core Ultra 9 285K) |
| Die size | 8x 81 mm2 | |
| Number of transistors | 33,200 million | of 135,240 million (EPYC 9684X) |
| 64 bit support | + | |
| Windows 11 compatibility | + |
Compatibility
Information on EPYC 7643 compatibility with other computer components and devices: 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 | of 8 (Xeon Platinum 8454H) |
| Socket | SP3 | |
| Power consumption (TDP) | 225 Watt | of 3100 ‑ 4500 (Ryzen 7 7435H) |
Technologies and extensions
Technological capabilities and additional instructions supported by EPYC 7643. You'll probably need this information if you require some particular technology.
| AES-NI | + | |
| AVX | + |
Virtualization technologies
Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.
| AMD-V | + |
Memory specs
Types, maximum amount and channel number of RAM supported by EPYC 7643's memory controller. Depending on the motherboard, higher memory frequency may be supported.
| Supported memory types | DDR4-3200 | |
| Maximum memory size | 4 TiB | of 6 TiB (EPYC 9654) |
| Maximum memory bandwidth | 204.795 GB/s | of 460.8 GB/s (EPYC 9654) |
Graphics specifications
General parameters of a GPU integrated into EPYC 7643.
| Integrated graphics card | N/A |
Peripherals
Specifications and connection types of supported peripherals.
| PCIe version | 4.0 | of 5.0 (EPYC 9655P) |
| PCI Express lanes | 128 |
Benchmark performance
Single-core and multi-core benchmark results of EPYC 7643. Overall benchmark performance 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.
Send your test results of EPYC 7643.
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Recommended GPUs
People consider these graphics cards to be good for EPYC 7643, according to our PC configuration statistics.
These are the fastest graphics cards for EPYC 7643 in our user configuration statistics. There is a total of 4 configurations using EPYC 7643 in our database.
