EPYC 7451 vs i5-2550K
Aggregate performance score
EPYC 7451 outperforms Core i5-2550K by a whopping 526% based on our aggregate benchmark results.
Primary details
Comparing Core i5-2550K and EPYC 7451 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1719 | 404 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.65 | 1.75 |
| Market segment | Desktop processor | Server |
| Series | no data | AMD EPYC |
| Power efficiency | 2.59 | 8.56 |
| Architecture codename | Sandy Bridge (2011−2013) | Naples (2017−2018) |
| Release date | January 2012 (12 years ago) | 29 June 2017 (7 years ago) |
| Launch price (MSRP) | $189 | $2,400 |
Cost-effectiveness evaluation
Performance per price, higher is better.
EPYC 7451 has 6% better value for money than i5-2550K.
Detailed specifications
Core i5-2550K and EPYC 7451 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 | 4 (Quad-Core) | 24 (Tetracosa-Core) |
| Threads | 4 | 48 |
| Base clock speed | 3.4 GHz | 2.3 GHz |
| Boost clock speed | 3.8 GHz | 3.2 GHz |
| Bus rate | 5 GT/s | no data |
| Multiplier | no data | 23 |
| L1 cache | 64 KB (per core) | 96K (per core) |
| L2 cache | 256 KB (per core) | 512K (per core) |
| L3 cache | 6144 KB (shared) | 64 MB (shared) |
| Chip lithography | 32 nm | 14 nm |
| Die size | 216 mm2 | 192 mm2 |
| Maximum core temperature | 73 °C | no data |
| Number of transistors | 1160 million | 4,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | + |
Compatibility
Information on Core i5-2550K and EPYC 7451 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 (Multiprocessor) |
| Socket | FCLGA1155,LGA1155 | TR4 |
| Power consumption (TDP) | 95 Watt | 180 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i5-2550K and EPYC 7451. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX | no data |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | - | no data |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
| FDI | - | no data |
| Fast Memory Access | + | no data |
Security technologies
Core i5-2550K and EPYC 7451 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | no data |
| Identity Protection | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i5-2550K and EPYC 7451 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 Core i5-2550K and EPYC 7451. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4 Eight-channel |
| Maximum memory size | 32 GB | 2 TiB |
| Max memory channels | 2 | 8 |
| Maximum memory bandwidth | 21 GB/s | 170.671 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Quick Sync Video | + | - |
Peripherals
Specifications and connection of peripherals supported by Core i5-2550K and EPYC 7451.
| PCIe version | 2.0 | 3.0 |
| PCI Express lanes | 16 | 128 |
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.
Pros & cons summary
| Performance score | 2.60 | 16.28 |
| Physical cores | 4 | 24 |
| Threads | 4 | 48 |
| Chip lithography | 32 nm | 14 nm |
| Power consumption (TDP) | 95 Watt | 180 Watt |
i5-2550K has 89.5% lower power consumption.
EPYC 7451, on the other hand, has a 526.2% higher aggregate performance score, 500% more physical cores and 1100% more threads, and a 128.6% more advanced lithography process.
The EPYC 7451 is our recommended choice as it beats the Core i5-2550K in performance tests.
Note that Core i5-2550K is a desktop processor while EPYC 7451 is a server/workstation one.
Should you still have questions on choice between Core i5-2550K and EPYC 7451, ask them in Comments section, and we shall answer.
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