Ryzen 7 7800X vs Ryzen 9 3900X
Primary details
Comparing Ryzen 9 3900X and Ryzen 7 7800X processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 275 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 21.75 | no data |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 9 | AMD Ryzen 7 |
| Power efficiency | 15.54 | no data |
| Architecture codename | Matisse (Zen 2) (2019−2020) | Zen 4 |
| Release date | 7 July 2019 (5 years ago) | no data |
| Launch price (MSRP) | $499 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 3900X and Ryzen 7 7800X 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 | 12 (Dodeca-Core) | 8 (Octa-Core) |
| Threads | 24 | 16 |
| Base clock speed | 3.8 GHz | 4.2 GHz |
| Boost clock speed | 4.6 GHz | 5 GHz |
| L1 cache | 96K (per core) | 512 KB |
| L2 cache | 512K (per core) | 8 MB |
| L3 cache | 64 MB | 96 MB |
| Chip lithography | 7 nm, 12 nm | 5 nm, 6 nm |
| Die size | no data | 71+122 mm |
| Maximum core temperature | 95 °C | no data |
| Number of transistors | 19,200 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | + | + |
Compatibility
Information on Ryzen 9 3900X and Ryzen 7 7800X 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 (Uniprocessor) | no data |
| Socket | AM4 | no data |
| Power consumption (TDP) | 125 Watt | 120 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3900X and Ryzen 7 7800X. You'll probably need this information if you require some particular technology.
| AES-NI | + | - |
| AVX | + | - |
| Precision Boost 2 | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 3900X and Ryzen 7 7800X are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900X and Ryzen 7 7800X. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | no data |
| Maximum memory size | 128 GB | 128 GB |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 51.196 GB/s | no data |
Pros & cons summary
| Physical cores | 12 | 8 |
| Threads | 24 | 16 |
| Chip lithography | 7 nm | 5 nm |
| Power consumption (TDP) | 125 Watt | 120 Watt |
Ryzen 9 3900X has 50% more physical cores and 50% more threads.
Ryzen 7 7800X, on the other hand, has a 40% more advanced lithography process, and 4.2% lower power consumption.
We couldn't decide between Ryzen 9 3900X and Ryzen 7 7800X. We've got no test results to judge.
Should you still have questions on choice between Ryzen 9 3900X and Ryzen 7 7800X, ask them in Comments section, and we shall answer.
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