Ryzen 9 7900X3D vs Ryzen 9 3950X
Aggregated performance score
Ryzen 9 7900X3D outperforms Ryzen 9 3950X by a substantial 30% based on our aggregated benchmark results.
Primary details
Comparing Ryzen 9 3950X and Ryzen 9 7900X3D processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 172 | 105 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 15.15 | 73.26 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 9 | AMD Ryzen 9 |
| Architecture codename | Matisse (Zen 2) (2019−2020) | Raphael |
| Release date | 14 November 2019 (4 years ago) | 4 January 2023 (1 year ago) |
| Launch price (MSRP) | $799 | no data |
| Current price | $1272 (1.6x MSRP) | $470 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Ryzen 9 7900X3D has 384% better value for money than Ryzen 9 3950X.
Detailed specifications
Ryzen 9 3950X and Ryzen 9 7900X3D 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 | 16 (Hexadeca-Core) | 12 (Dodeca-Core) |
| Threads | 32 | 24 |
| Base clock speed | 3.5 GHz | 4.4 GHz |
| Boost clock speed | 4.7 GHz | 5.6 GHz |
| L1 cache | 96K (per core) | 64K (per core) |
| L2 cache | 512K (per core) | 1 MB (per core) |
| L3 cache | 64 MB | 128 MB (shared) |
| Chip lithography | 7 nm | 5 nm, 6 nm |
| Die size | 2 x 72 mm + 125 mm (IO-Die) mm2 | 2x 71 mm2 |
| Maximum case temperature (TCase) | no data | 47 °C |
| Number of transistors | 19,200 million | 13,140 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | Yes | Yes |
Compatibility
Information on Ryzen 9 3950X and Ryzen 9 7900X3D 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) | 1 |
| Socket | AM4 | AM5 |
| Power consumption (TDP) | 105 Watt | 120 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 3950X and Ryzen 9 7900X3D. You'll probably need this information if you require some particular technology.
| Instruction set extensions | 86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2 | no data |
| AES-NI | + | + |
| AVX | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 3950X and Ryzen 9 7900X3D are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3950X and Ryzen 9 7900X3D. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Dual-channel | DDR5-5200 |
| Maximum memory size | 128 GB | 128 GB |
| Maximum memory bandwidth | 51.196 GB/s | no data |
| ECC memory support | + | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | AMD Radeon Graphics |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 3950X and Ryzen 9 7900X3D.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 24 |
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.
Ryzen 9 7900X3D outperforms Ryzen 9 3950X by 30% based on our aggregated benchmark results.
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.
Benchmark coverage: 68%
Ryzen 9 7900X3D outperforms Ryzen 9 3950X by 30% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Ryzen 9 7900X3D outperforms Ryzen 9 3950X by 64% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Ryzen 9 7900X3D outperforms Ryzen 9 3950X by 61% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 25.08 | 32.60 |
| Recency | 14 November 2019 | 4 January 2023 |
| Physical cores | 16 | 12 |
| Threads | 32 | 24 |
| Chip lithography | 7 nm | 5 nm |
| Power consumption (TDP) | 105 Watt | 120 Watt |
The Ryzen 9 7900X3D is our recommended choice as it beats the Ryzen 9 3950X in performance tests.
Should you still have questions on choice between Ryzen 9 3950X and Ryzen 9 7900X3D, 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.
