i9-7900X vs Ryzen 9 7940H
Aggregate performance score
Ryzen 9 7940H outperforms i9-7900X by a substantial 36% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 7940H and Core i9-7900X processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 318 | 535 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 3.24 |
| Market segment | Laptop | Desktop processor |
| Series | no data | Core i9 (Desktop) |
| Architecture codename | Phoenix (2023−2024) | Skylake (server) (2017−2019) |
| Release date | January 2023 (1 year ago) | 30 May 2017 (7 years ago) |
| Launch price (MSRP) | no data | $999 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 7940H and Core i9-7900X 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) | 10 (Deca-Core) |
| Threads | 16 | 20 |
| Base clock speed | 4 GHz | 3.3 GHz |
| Boost clock speed | 5.2 GHz | 4.5 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | no data | 4 × 8 GT/s |
| Multiplier | no data | 33 |
| L1 cache | 64K (per core) | 640 KB |
| L2 cache | 1 MB (per core) | 10 MB |
| L3 cache | 16 MB (shared) | 13.75 MB |
| Chip lithography | 4 nm | 14 nm |
| Die size | 178 mm2 | no data |
| Maximum core temperature | no data | 95 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| Number of transistors | 25,000 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Ryzen 9 7940H and Core i9-7900X 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 | FP8 | Socket R4 |
| Power consumption (TDP) | 35 Watt | 140 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 7940H and Core i9-7900X. 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 | + | + |
| vPro | no data | + |
| 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 | + |
| Status | no data | Discontinued |
| Precision Boost 2 | + | no data |
Security technologies
Ryzen 9 7940H and Core i9-7900X technologies aimed at improving security, for example, by protecting against hacks.
| EDB | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 7940H and Core i9-7900X 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 Ryzen 9 7940H and Core i9-7900X. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5-5600 | DDR4 |
| 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 780M | N/A |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 7940H and Core i9-7900X.
| PCIe version | 4.0 | 3.0 |
| PCI Express lanes | 20 | 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. 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 | 18.50 | 13.64 |
| Physical cores | 8 | 10 |
| Threads | 16 | 20 |
| Chip lithography | 4 nm | 14 nm |
| Power consumption (TDP) | 35 Watt | 140 Watt |
Ryzen 9 7940H has a 35.6% higher aggregate performance score, a 250% more advanced lithography process, and 300% lower power consumption.
i9-7900X, on the other hand, has 25% more physical cores and 25% more threads.
The Ryzen 9 7940H is our recommended choice as it beats the Core i9-7900X in performance tests.
Be aware that Ryzen 9 7940H is a notebook processor while Core i9-7900X is a desktop one.
Should you still have questions on choice between Ryzen 9 7940H and Core i9-7900X, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
