Intel Core i9-7940X серии X vs Intel Core i9-7900X серии X: comparison
Comparison of Intel Core i9-7940X серии X and Intel Core i9-7900X серии X: key differences and a full specification table.
Key differences
Intel Core i9-7940X серии X has more cores (14 vs 10) and more threads (28 vs 20).
At the same time, Intel Core i9-7900X серии X has a higher base clock (3.3 GHz vs 3.1 GHz) and a lower TDP (140 W vs 165 W).
Both processors match on: maximum clock (4.3 GHz), maximum memory size (128 GB), memory channels (4), PCIe version (3).
These are specification values: they show differences between the models but do not determine a performance winner. For a specific workload, rely on independent benchmarks.
Key specifications
| Parameter | Intel Core i9-7940X серии X | Intel Core i9-7900X серии X |
|---|---|---|
| Cores / threads | 14 / 28 | 10 / 20 |
| Max boost clock | 4.3 GHz | 4.3 GHz |
| L3 cache | — | 13.75 MB |
| TDP | 165 W | 140 W |
| Process | — | 14 nm |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | Intel Core i9-7940X серии X | Intel Core i9-7900X серии X |
|---|---|---|
| General | ||
| Model | i9-7940X | i9-7900X |
| Codename | Skylake | Skylake |
| Segment | Desktop | Desktop |
| Product line | Процессоры Intel Core серии X | Процессоры Intel Core серии X |
| Process | — | 14 nm |
| Launch date | Q3 2017 | Q2 2017 |
| Status | Discontinued | Discontinued |
| Servicing status | Baseline Servicing | Baseline Servicing |
| End of servicing updates | 12/31/2023 | 12/31/2023 |
| Embedded options available | No | No |
| Box contents | Please note: The boxed product does not include a fan or heat sink | Please note: The boxed product does not include a fan or heat sink |
| CPU | ||
| Cores | 14 | 10 |
| Threads | 28 | 20 |
| Multithreading (SMT/HT) | Yes | Yes |
| Base clock | 3.1 GHz | 3.3 GHz |
| Max boost clock | 4.3 GHz | 4.3 GHz |
| Turbo Boost Max 3.0 frequency | 4.4 GHz | 4.5 GHz |
| L3 cache | — | 13.75 MB |
| Cache (level unspecified) | 19.25 MB | — |
| Bus speed | 8 GT/s | 8 GT/s |
| TDP | 165 W | 140 W |
| Turbo Boost | Yes (2) | Yes (2) |
| 64-bit support | Yes | Yes |
| Instruction set width | — | 64 bit |
| Instruction set extensions | SSE4.1, SSE4.2, AVX2, AVX-512 | SSE4.1, SSE4.2, AVX2, AVX-512 |
| QPI links | 0 | 0 |
| Memory | ||
| Max memory size | 128 GB | 128 GB |
| Memory types | DDR4 | DDR4 |
| Memory channels | 4 | 4 |
| Max memory bandwidth | 85 GB/s | 85 GB/s |
| ECC memory supported | No | No |
| I/O and interfaces | ||
| PCI Express revision | 3 | 3 |
| PCI Express lanes | 44 | 44 |
| Scalability | 1S Only | 1S Only |
| Package and thermal | ||
| Sockets supported | FCLGA2066 | FCLGA2066 |
| Max CPU configuration | 1 | 1 |
| TJUNCTION | 102 °C | 95 °C |
| Thermal solution specification | PCG 2017X | PCG 2017X |
| Security and virtualization | ||
| Virtualization (VT-x / AMD-V) | Yes | Yes |
| Virtualization for Directed I/O (VT-d) | Yes | Yes |
| AES-NI | Yes | Yes |
| Execute Disable Bit | Yes | Yes |
| Technologies | ||
| Enhanced SpeedStep | Yes | Yes |
| Turbo Boost Max 3.0 | Yes | Yes |
| Optane Memory Supported | Yes | Yes |
| AVX-512 FMA units | 2 | 2 |
Other comparisons
- Intel Core i9-7940X серии X vs Intel Core i9-7960X серии X
- Intel Core i9-7940X серии X vs Intel Core i9-7980XE Extreme Edition
- Intel Core i9-7940X серии X vs Intel Core i9-7920X серии X
- Intel Core i9-7900X серии X vs Intel Core i7-7820X серии X
- Intel Core i9-7900X серии X vs Intel Core i7-7800X серии X
- Intel Core i9-7900X серии X vs Intel Core i9-7920X серии X