Ryzen Threadripper PRO 3955WX vs Ryzen Threadripper PRO 3945WX
Aggregate performance score
Ryzen Threadripper PRO 3955WX outperforms Ryzen Threadripper PRO 3945WX by a significant 20% based on our aggregate benchmark results.
Primary details
Comparing Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 261 | 200 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Series | AMD Ryzen Threadripper | AMD Ryzen Threadripper |
| Power efficiency | 7.14 | 8.58 |
| Architecture codename | Matisse (2019−2020) | Matisse (2019−2020) |
| Release date | 14 July 2020 (4 years ago) | 14 July 2020 (4 years ago) |
Detailed specifications
Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX 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) | 16 (Hexadeca-Core) |
| Threads | 24 | 32 |
| Base clock speed | 4 GHz | 3.9 GHz |
| Boost clock speed | 4.3 GHz | 4.3 GHz |
| Multiplier | 40 | 39 |
| L1 cache | 64K (per core) | 64K (per core) |
| L2 cache | 512K (per core) | 512K (per core) |
| L3 cache | 64 MB | 64 MB |
| Chip lithography | 7 nm, 12 nm | 7 nm, 12 nm |
| Die size | 74 mm2 | 74 mm2 |
| Maximum case temperature (TCase) | 95 °C | 95 °C |
| Number of transistors | 3,800 million | 3,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | + | + |
Compatibility
Information on Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX 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 |
| Socket | TR4 | TR4 |
| Power consumption (TDP) | 280 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR4-3200 |
| Maximum memory size | 2 TiB | 2 TiB |
| Maximum memory bandwidth | 204.8 GB/s | 204.8 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | - |
Peripherals
Specifications and connection of peripherals supported by Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX.
| PCIe version | 4.0 | 4.0 |
| PCI Express lanes | 128 | 128 |
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.
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.
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.
Pros & cons summary
| Performance score | 21.10 | 25.36 |
| Physical cores | 12 | 16 |
| Threads | 24 | 32 |
Ryzen Threadripper PRO 3955WX has a 20.2% higher aggregate performance score, and 33.3% more physical cores and 33.3% more threads.
The Ryzen Threadripper PRO 3955WX is our recommended choice as it beats the Ryzen Threadripper PRO 3945WX in performance tests.
Should you still have questions on choice between Ryzen Threadripper PRO 3945WX and Ryzen Threadripper PRO 3955WX, ask them in Comments section, and we shall answer.
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