Ryzen Threadripper PRO 9945WX vs Sempron 3400+
Aggregate performance score
Ryzen Threadripper PRO 9945WX outperforms Sempron 3400+ by a whopping 18865% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3543 | 156 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Server |
| Power efficiency | 0.29 | 9.88 |
| Designer | AMD | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Palermo (2001−2005) | Shimada Peak (2025) |
| Release date | 1 October 2005 (20 years ago) | July 2025 (recently) |
| Launch price (MSRP) | $30 | no data |
Detailed specifications
Sempron 3400+ and Ryzen Threadripper PRO 9945WX 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 | 1 (Single-Core) | 12 (Dodeca-Core) |
| Threads | 1 | 24 |
| Base clock speed | no data | 4.7 GHz |
| Boost clock speed | 2 GHz | 5.4 GHz |
| L1 cache | 128 KB | 64 KB (per core) |
| L2 cache | 128 KB | 1 MB (per core) |
| L3 cache | 0 KB | 64 MB (shared) |
| Chip lithography | 90 nm | 4 nm |
| Die size | 103 mm2 | 2x 70.6 mm2 |
| Number of transistors | 63 million | 16,630 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Sempron 3400+ and Ryzen Threadripper PRO 9945WX 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 | 939 | sTR5 |
| Power consumption (TDP) | 62 Watt | 350 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Sempron 3400+ and Ryzen Threadripper PRO 9945WX. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Sempron 3400+ and Ryzen Threadripper PRO 9945WX are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Sempron 3400+ and Ryzen Threadripper PRO 9945WX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | N/A |
Peripherals
Specifications and connection of peripherals supported by Sempron 3400+ and Ryzen Threadripper PRO 9945WX.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 136 |
Synthetic benchmarks
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.
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. Other than that, Passmark measures multi-core performance.
Pros & cons summary
| Performance score | 0.17 | 32.24 |
| Physical cores | 1 | 12 |
| Threads | 1 | 24 |
| Chip lithography | 90 nm | 4 nm |
| Power consumption (TDP) | 62 Watt | 350 Watt |
Sempron 3400+ has 464.5% lower power consumption.
Ryzen Threadripper PRO 9945WX, on the other hand, has a 18864.7% higher aggregate performance score, 1100% more physical cores and 2300% more threads, and a 2150% more advanced lithography process.
The AMD Ryzen Threadripper PRO 9945WX is our recommended choice as it beats the AMD Sempron 3400+ in performance tests.
Note that Sempron 3400+ is a desktop processor while Ryzen Threadripper PRO 9945WX is a server/workstation one.
Other comparisons
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