Ryzen Threadripper PRO 3945WX vs Phenom II X3 P820
Aggregate performance score
Ryzen Threadripper PRO 3945WX outperforms Phenom II X3 P820 by a whopping 3100% based on our aggregate benchmark results.
Primary details
Comparing Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2740 | 258 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Server |
| Series | 3x AMD Phenom II | AMD Ryzen Threadripper |
| Power efficiency | 2.50 | 7.14 |
| Architecture codename | Champlain (2010−2011) | Matisse (2019−2020) |
| Release date | 12 May 2010 (14 years ago) | 14 July 2020 (4 years ago) |
Detailed specifications
Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX 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 | 3 (Tri-Core) | 12 (Dodeca-Core) |
| Threads | 3 | 24 |
| Base clock speed | no data | 4 GHz |
| Boost clock speed | 1.8 GHz | 4.3 GHz |
| Bus rate | 3600 MHz | no data |
| Multiplier | no data | 40 |
| L1 cache | 384 KB | 64K (per core) |
| L2 cache | 1.5 MB | 512K (per core) |
| L3 cache | no data | 64 MB |
| Chip lithography | 45 nm | 7 nm, 12 nm |
| Die size | no data | 74 mm2 |
| Maximum case temperature (TCase) | no data | 95 °C |
| Number of transistors | no data | 3,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX 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 | no data | 1 |
| Socket | S1 | TR4 |
| Power consumption (TDP) | 25 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Virtualization, AMD64, Advanced Virus Protection, SSE(1,2,3,4a) | no data |
| AES-NI | - | + |
| AVX | - | + |
| VirusProtect | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX. 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 |
Peripherals
Specifications and connection of peripherals supported by Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 128 |
Pros & cons summary
| Performance score | 0.66 | 21.12 |
| Recency | 12 May 2010 | 14 July 2020 |
| Physical cores | 3 | 12 |
| Threads | 3 | 24 |
| Chip lithography | 45 nm | 7 nm |
| Power consumption (TDP) | 25 Watt | 280 Watt |
Phenom II X3 P820 has 1020% lower power consumption.
Ryzen Threadripper PRO 3945WX, on the other hand, has a 3100% higher aggregate performance score, an age advantage of 10 years, 300% more physical cores and 700% more threads, and a 542.9% more advanced lithography process.
The Ryzen Threadripper PRO 3945WX is our recommended choice as it beats the Phenom II X3 P820 in performance tests.
Be aware that Phenom II X3 P820 is a notebook processor while Ryzen Threadripper PRO 3945WX is a server/workstation one.
Should you still have questions on choice between Phenom II X3 P820 and Ryzen Threadripper PRO 3945WX, ask them in Comments section, and we shall answer.
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