AMD EPYC 7643 vs MediaTek Dimensity 820
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CPU comparison with benchmarks
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| AMD EPYC 7643 | MediaTek Dimensity 820 | |
CPU comparisonAMD EPYC 7643 or MediaTek Dimensity 820 - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.
The AMD EPYC 7643 has 48 cores with 96 threads and clocks with a maximum frequency of 3.60 GHz. Up to 4096 GB of memory is supported in 8 memory channels. The AMD EPYC 7643 was released in Q1/2021. The MediaTek Dimensity 820 has 8 cores with 8 threads and clocks with a maximum frequency of 2.60 GHz. The CPU supports up to 16 GB of memory in 2 memory channels. The MediaTek Dimensity 820 was released in Q2/2020. |
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| AMD EPYC (129) | Family | Mediatek Dimensity (36) |
| AMD EPYC 7003 (29) | CPU group | MediaTek Dimensity 820 (1) |
| 3 | Generation | 1 |
| Milan (Zen 3) | Architecture | Cortex-A76 / Cortex-A55 |
| Desktop / Server | Segment | Mobile |
| AMD EPYC 7642 | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD EPYC 7643 has 48 CPU cores and can calculate 96 threads in parallel. The clock frequency of the AMD EPYC 7643 is 2.30 GHz (3.60 GHz) while the MediaTek Dimensity 820 has 8 CPU cores and 8 threads can calculate simultaneously. The clock frequency of the MediaTek Dimensity 820 is at 2.60 GHz. |
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| AMD EPYC 7643 | Characteristic | MediaTek Dimensity 820 |
| 48 | Cores | 8 |
| 96 | Threads | 8 |
| normal | Core architecture | hybrid (big.LITTLE) |
| Yes | Hyperthreading | No |
| No | Overclocking ? | No |
| 2.30 GHz (3.60 GHz) 48x Zen 3 |
A-Core | 2.60 GHz 4x Cortex-A76 |
| -- | B-Core | 2.00 GHz 4x Cortex-A55 |
Integrated graphics (iGPU)The AMD EPYC 7643 or MediaTek Dimensity 820 has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die. |
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| no iGPU | GPU | ARM Mali-G57 MP5 |
| GPU frequency | 0.90 GHz | |
| -- | GPU (Turbo) | -- |
| -- | GPU Generation | Vallhall 1 |
| Technology | 7 nm | |
| Max. displays | 2 | |
| -- | Compute units | 5 |
| -- | Shader | 80 |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| -- | Max. GPU Memory | 4 GB |
| -- | DirectX Version | 12 |
Hardware codec supportA photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos. |
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| no iGPU | GPU | ARM Mali-G57 MP5 |
| No | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| No | Codec h264 | Decode / Encode |
| No | Codec VP9 | Decode / Encode |
| No | Codec VP8 | Decode / Encode |
| No | Codec AV1 | Decode |
| No | Codec AVC | Decode / Encode |
| No | Codec VC-1 | Decode / Encode |
| No | Codec JPEG | Decode / Encode |
Memory & PCIeThe AMD EPYC 7643 can use up to 4096 GB of memory in 8 memory channels. The maximum memory bandwidth is 204.8 GB/s. The MediaTek Dimensity 820 supports up to 16 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 17.2 GB/s. |
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| AMD EPYC 7643 | Characteristic | MediaTek Dimensity 820 |
| DDR4-3200 | Memory | LPDDR4X-4266 |
| 4096 GB | Max. Memory | 16 GB |
| 8 (Octa Channel) | Memory channels | 2 (Dual Channel) |
| 204.8 GB/s | Max. Bandwidth | 17.2 GB/s |
| Yes | ECC | No |
| -- | L2 Cache | -- |
| 256.00 MB | L3 Cache | -- |
| 4.0 | PCIe version | -- |
| 128 | PCIe lanes | -- |
| 252.0 GB/s | PCIe Bandwidth | -- |
Thermal ManagementThe thermal design power (TDP for short) of the AMD EPYC 7643 is 240 W, while the MediaTek Dimensity 820 has a TDP of --. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| AMD EPYC 7643 | Characteristic | MediaTek Dimensity 820 |
| 240 W | TDP (PL1 / PBP) | -- |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| 225 W | TDP down | -- |
| -- | Tjunction max. | -- |
Technical detailsThe AMD EPYC 7643 is manufactured in 7 nm and has 256.00 MB cache. The MediaTek Dimensity 820 is manufactured in 7 nm and has a 0.00 MB cache. |
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| AMD EPYC 7643 | Characteristic | MediaTek Dimensity 820 |
| 7 nm | Technology | 7 nm |
| Chiplet | Chip design | Chiplet |
| x86-64 (64 bit) | Instruction set (ISA) | Armv8-A (64 bit) |
| SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 | ISA extensions | -- |
| SP3 | Socket | -- |
| AMD-V, SVM | Virtualization | None |
| Yes | AES-NI | No |
| Windows 10, Linux | Operating systems | Android |
| Q1/2021 | Release date | Q2/2020 |
| 4995 $ | Release price | -- |
| show more data | show more data | |
48C 96T @ 2.30 GHz (3.60 GHz) buy now on Amazon and save!
8C 8T @ 2.60 GHz buy now on Amazon and save!
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 2 CPU benchmarks
⌀ Multi core performance in 3 CPU benchmarks
Geekbench 5, 64bit (Single-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD EPYC 7643
48C 96T @ 3.60 GHz |
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MediaTek Dimensity 820
8C 8T @ 2.60 GHz |
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Geekbench 5, 64bit (Multi-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD EPYC 7643
48C 96T @ 3.40 GHz |
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MediaTek Dimensity 820
8C 8T @ 2.60 GHz |
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Geekbench 6 (Single-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
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AMD EPYC 7643
48C 96T @ 3.60 GHz |
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MediaTek Dimensity 820
8C 8T @ 2.60 GHz |
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Geekbench 6 (Multi-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
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AMD EPYC 7643
48C 96T @ 3.40 GHz |
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MediaTek Dimensity 820
8C 8T @ 2.60 GHz |
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Estimated results for PassMark CPU Mark
Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
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AMD EPYC 7643
48C 96T @ 3.40 GHz |
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MediaTek Dimensity 820
8C 8T @ 2.60 GHz |
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iGPU - FP32 Performance (Single-precision GFLOPS)
The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
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AMD EPYC 7643
@ 0.00 GHz |
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MediaTek Dimensity 820
ARM Mali-G57 MP5 @ 0.90 GHz |
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AnTuTu 9 Benchmark
The AnTuTu 9 benchmark is very well suited to measuring the performance of a smartphone. AnTuTu 9 is quite heavy on 3D graphics and can now also use the "Metal" graphics interface. In AnTuTu, memory and UX (user experience) are also tested by simulating browser and app usage. AnTuTu version 9 can compare any ARM CPU running on Android or iOS. Devices may not be directly comparable when benchmarked on different operating systems.
In the AnTuTu 9 benchmark, the single-core performance of a processor is only slightly weighted. The rating is made up of the multi-core performance of the processor, the speed of the working memory, and the performance of the internal graphics.
In the AnTuTu 9 benchmark, the single-core performance of a processor is only slightly weighted. The rating is made up of the multi-core performance of the processor, the speed of the working memory, and the performance of the internal graphics.
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AMD EPYC 7643
48C 96T @ 2.30 GHz |
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MediaTek Dimensity 820
8C 8T @ 2.60 GHz |
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AnTuTu 8 Benchmark
The AnTuTu 8 Benchmark measures the performance of a SoC. AnTuTu benchmarks the CPU, GPU, Memory as well as the UX (User Experience) by simulating browser and app usage. AnTuTu can benchmark any ARM CPU that runs under Android or iOS. Devices may not be directly compareable if the benchmark has been performed under different operating systems.
In the AnTuTu 8 benchmark, the single-core performance of a processor is only slightly weighted. The evaluation consists of the multi-core performance of the processor, the speed of the RAM and the performance of the internal graphics.
In the AnTuTu 8 benchmark, the single-core performance of a processor is only slightly weighted. The evaluation consists of the multi-core performance of the processor, the speed of the RAM and the performance of the internal graphics.
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AMD EPYC 7643
48C 96T @ 2.30 GHz |
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MediaTek Dimensity 820
8C 8T @ 2.60 GHz |
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Devices using this processor |
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| AMD EPYC 7643 | MediaTek Dimensity 820 |
| Unknown | Unknown |
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