i9-7940X vs EPYC 4345P
Aggregate performance score
EPYC 4345P outperforms Core i9-7940X by a considerable 47% 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 | 262 | 480 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 60.51 | 2.75 |
| Market segment | Server | Desktop processor |
| Series | no data | Intel Core i9 |
| Power efficiency | 34.77 | 9.32 |
| Designer | AMD | Intel |
| Manufacturer | TSMC | Intel |
| Architecture codename | Grado (2025) | Skylake (server) (2017−2018) |
| Release date | 13 May 2025 (recently) | 1 September 2017 (7 years ago) |
| Launch price (MSRP) | $329 | $1,399 |
Cost-effectiveness evaluation
Performance per price, higher is better.
EPYC 4345P has 2100% better value for money than i9-7940X.
Performance to price scatter graph
Detailed specifications
EPYC 4345P and Core i9-7940X 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) | 14 (Tetradeca-Core) |
| Threads | 16 | 28 |
| Base clock speed | 3.8 GHz | 3.1 GHz |
| Boost clock speed | 5.5 GHz | 4.4 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | no data | 4 × 8 GT/s |
| L1 cache | 80 KB (per core) | 64 KB (per core) |
| L2 cache | 1 MB (per core) | 1 MB (per core) |
| L3 cache | 32 MB (shared) | 19.25 MB (shared) |
| Chip lithography | 4 nm | 14 nm |
| Die size | 70.6 mm2 | 484 mm2 |
| Maximum core temperature | no data | 102 °C |
| Number of transistors | 8,315 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | + |
| Unlocked multiplier | - | + |
Compatibility
Information on EPYC 4345P and Core i9-7940X 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 | 1 (Uniprocessor) |
| Socket | AM5 | FCLGA2066 |
| Power consumption (TDP) | 65 Watt | 165 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by EPYC 4345P and Core i9-7940X. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | - | + |
| Turbo Boost Max 3.0 | no data | + |
| Precision Boost 2 | + | no data |
Security technologies
EPYC 4345P and Core i9-7940X technologies aimed at improving security, for example, by protecting against hacks.
| EDB | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by EPYC 4345P and Core i9-7940X 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 EPYC 4345P and Core i9-7940X. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR4-2666 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 4 |
| Maximum memory bandwidth | no data | 85.33 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon Graphics | N/A |
Peripherals
Specifications and connection of peripherals supported by EPYC 4345P and Core i9-7940X.
| PCIe version | 5.0 | 3.0 |
| PCI Express lanes | 24 | 44 |
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.
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.
Pros & cons summary
| Performance score | 23.43 | 15.95 |
| Recency | 13 May 2025 | 1 September 2017 |
| Physical cores | 8 | 14 |
| Threads | 16 | 28 |
| Chip lithography | 4 nm | 14 nm |
| Power consumption (TDP) | 65 Watt | 165 Watt |
EPYC 4345P has a 46.9% higher aggregate performance score, an age advantage of 7 years, a 250% more advanced lithography process, and 153.8% lower power consumption.
i9-7940X, on the other hand, has 75% more physical cores and 75% more threads.
The AMD EPYC 4345P is our recommended choice as it beats the Intel Core i9-7940X in performance tests.
Be aware that EPYC 4345P is a server/workstation processor while Core i9-7940X is a desktop one.
Other comparisons
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