Ryzen Threadripper PRO 3955WX vs Phenom II X4 945 (125W)
Primary details
Comparing Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 187 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Series | no data | AMD Ryzen Threadripper |
| Power efficiency | no data | 8.57 |
| Architecture codename | Deneb (2009−2011) | Matisse (2019−2020) |
| Release date | 23 April 2009 (15 years ago) | 14 July 2020 (4 years ago) |
Detailed specifications
Phenom II X4 945 (125W) 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 | 4 (Quad-Core) | 16 (Hexadeca-Core) |
| Threads | 4 | 32 |
| Base clock speed | 3 GHz | 3.9 GHz |
| Boost clock speed | 3 GHz | 4.3 GHz |
| Multiplier | no data | 39 |
| L1 cache | 128 KB (per core) | 64K (per core) |
| L2 cache | 512 KB (per core) | 512K (per core) |
| L3 cache | 6 MB (shared) | 64 MB |
| Chip lithography | 45 nm | 7 nm, 12 nm |
| Die size | 258 mm2 | 74 mm2 |
| Maximum case temperature (TCase) | no data | 95 °C |
| Number of transistors | 758 million | 3,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Phenom II X4 945 (125W) 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 | AM3 | TR4 |
| Power consumption (TDP) | 125 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X4 945 (125W) 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 Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4-3200 |
| Maximum memory size | no data | 2 TiB |
| Maximum memory bandwidth | no data | 204.8 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | - |
Peripherals
Specifications and connection of peripherals supported by Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX.
| PCIe version | 2.0 | 4.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Recency | 23 April 2009 | 14 July 2020 |
| Physical cores | 4 | 16 |
| Threads | 4 | 32 |
| Chip lithography | 45 nm | 7 nm |
| Power consumption (TDP) | 125 Watt | 280 Watt |
Phenom II X4 945 (125W) has 124% lower power consumption.
Ryzen Threadripper PRO 3955WX, on the other hand, has an age advantage of 11 years, 300% more physical cores and 700% more threads, and a 542.9% more advanced lithography process.
We couldn't decide between Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX. We've got no test results to judge.
Note that Phenom II X4 945 (125W) is a desktop processor while Ryzen Threadripper PRO 3955WX is a server/workstation one.
Should you still have questions on choice between Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX, ask them in Comments section, and we shall answer.
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