Ryzen Threadripper PRO 3945WX vs Xeon E3-1281 v3
Aggregate performance score
Ryzen Threadripper PRO 3945WX outperforms Xeon E3-1281 v3 by a whopping 347% based on our aggregate benchmark results.
Primary details
Comparing Xeon E3-1281 v3 and Ryzen Threadripper PRO 3945WX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1274 | 262 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Series | no data | AMD Ryzen Threadripper |
| Power efficiency | 5.44 | 7.13 |
| Architecture codename | no data | Matisse (2019−2020) |
| Release date | 1 April 2014 (10 years ago) | 14 July 2020 (4 years ago) |
Detailed specifications
Xeon E3-1281 v3 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 | 4 (Quad-Core) | 12 (Dodeca-Core) |
| Threads | 8 | 24 |
| Base clock speed | 3.7 GHz | 4 GHz |
| Boost clock speed | 4.1 GHz | 4.3 GHz |
| Bus rate | 5 GT/s | no data |
| Multiplier | no data | 40 |
| L1 cache | no data | 64K (per core) |
| L2 cache | no data | 512K (per core) |
| L3 cache | 8 MB Intel® Smart Cache | 64 MB |
| Chip lithography | 22 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 Xeon E3-1281 v3 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 | 1 | 1 |
| Socket | FCLGA1150 | TR4 |
| Power consumption (TDP) | 82 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon E3-1281 v3 and Ryzen Threadripper PRO 3945WX. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | no data |
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | no data |
| TSX | + | - |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
| SIPP | + | - |
| Fast Memory Access | + | no data |
Security technologies
Xeon E3-1281 v3 and Ryzen Threadripper PRO 3945WX technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
| Secure Key | + | no data |
| Identity Protection | + | - |
| OS Guard | + | no data |
| Anti-Theft | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon E3-1281 v3 and Ryzen Threadripper PRO 3945WX are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon E3-1281 v3 and Ryzen Threadripper PRO 3945WX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3L-1333, DDR3L-1600 | DDR4-3200 |
| Maximum memory size | 32 GB | 2 TiB |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 25.6 GB/s | 204.8 GB/s |
| ECC memory support | + | - |
Peripherals
Specifications and connection of peripherals supported by Xeon E3-1281 v3 and Ryzen Threadripper PRO 3945WX.
| PCIe version | 3.0 | 4.0 |
| PCI Express lanes | 16 | 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 | 4.72 | 21.10 |
| Recency | 1 April 2014 | 14 July 2020 |
| Physical cores | 4 | 12 |
| Threads | 8 | 24 |
| Chip lithography | 22 nm | 7 nm |
| Power consumption (TDP) | 82 Watt | 280 Watt |
Xeon E3-1281 v3 has 241.5% lower power consumption.
Ryzen Threadripper PRO 3945WX, on the other hand, has a 347% higher aggregate performance score, an age advantage of 6 years, 200% more physical cores and 200% more threads, and a 214.3% more advanced lithography process.
The Ryzen Threadripper PRO 3945WX is our recommended choice as it beats the Xeon E3-1281 v3 in performance tests.
Should you still have questions on choice between Xeon E3-1281 v3 and Ryzen Threadripper PRO 3945WX, ask them in Comments section, and we shall answer.
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