A6-7400K vs EPYC 7551
Aggregate performance score
EPYC 7551 outperforms A6-7400K by a whopping 1438% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 570 | 2748 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.98 | no data |
| Market segment | Server | Desktop processor |
| Series | AMD EPYC | no data |
| Power efficiency | 3.46 | 0.62 |
| Designer | AMD | AMD |
| Manufacturer | no data | GlobalFoundries |
| Architecture codename | Naples (2017−2018) | Kaveri (2014−2015) |
| Release date | 20 June 2017 (8 years ago) | 31 July 2014 (11 years ago) |
| Launch price (MSRP) | $3,400 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
EPYC 7551 and A6-7400K 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 | 32 (Dotriaconta-Core) | 2 (Dual-core) |
| Threads | 64 | 2 |
| Base clock speed | 2 GHz | 3.5 GHz |
| Boost clock speed | 2 GHz | 3.9 GHz |
| Multiplier | 20 | no data |
| L1 cache | 3 MB | 128 KB |
| L2 cache | 16 MB | 1024 KB |
| L3 cache | 64 MB (shared) | no data |
| Chip lithography | 14 nm | 28 nm |
| Die size | 213 mm2 | 245 mm2 |
| Maximum core temperature | no data | 70 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 19200 Million | 2,411 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | + | + |
Compatibility
Information on EPYC 7551 and A6-7400K 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 (Multiprocessor) | 1 |
| Socket | TR4 | FM2+ |
| Power consumption (TDP) | 180 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 7551 and A6-7400K. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| FMA | - | + |
| AVX | + | + |
| FRTC | - | + |
| FreeSync | - | + |
| TrueAudio | - | + |
| PowerNow | - | + |
| PowerGating | - | + |
| Out-of-band client management | - | + |
| VirusProtect | - | + |
| HSA | - | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 7551 and A6-7400K are enumerated here.
| AMD-V | + | + |
| IOMMU 2.0 | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by EPYC 7551 and A6-7400K. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Eight-channel | DDR3-1866 |
| Maximum memory size | 2 TiB | no data |
| Max memory channels | 8 | 2 |
| Maximum memory bandwidth | 170.671 GB/s | no data |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | AMD Radeon R5 Graphics |
| iGPU core count | no data | 4 |
| จำนวนพาธไลน์ | no data | 256 |
| Enduro | - | + |
| Switchable graphics | - | + |
| UVD | - | + |
| VCE | - | + |
Graphics interfaces
Available interfaces and connections of EPYC 7551 and A6-7400K integrated GPUs.
| DisplayPort | - | + |
| HDMI | - | + |
Graphics API support
APIs supported by EPYC 7551 and A6-7400K integrated GPUs, sometimes API versions are included.
| DirectX | no data | DirectX® 12 |
| Vulkan | - | + |
Peripherals
Specifications and connection of peripherals supported by EPYC 7551 and A6-7400K.
| PCIe version | 3.0 | 3.0 |
| PCI Express lanes | 128 | 16 |
Synthetic benchmarks
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.
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. Other than that, Passmark measures multi-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 | 14.76 | 0.96 |
| Recency | 20 June 2017 | 31 July 2014 |
| Physical cores | 32 | 2 |
| Threads | 64 | 2 |
| Chip lithography | 14 nm | 28 nm |
| Power consumption (TDP) | 180 Watt | 65 Watt |
EPYC 7551 has a 1437.5% higher aggregate performance score, an age advantage of 2 years, 1500% more physical cores and 3100% more threads, and a 100% more advanced lithography process.
A6-7400K, on the other hand, has 176.9% lower power consumption.
The AMD EPYC 7551 is our recommended choice as it beats the AMD A6-7400K in performance tests.
Be aware that EPYC 7551 is a server/workstation processor while A6-7400K is a desktop one.
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