Athlon II X4 645 vs Ryzen Threadripper 1900X
Aggregate performance score
Ryzen Threadripper 1900X outperforms Athlon II X4 645 by a whopping 618% based on our aggregate benchmark results.
Primary details
Comparing Ryzen Threadripper 1900X and Athlon II X4 645 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 728 | 2149 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 3.85 | 3.30 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen Threadripper | no data |
| Power efficiency | 5.56 | 1.47 |
| Architecture codename | Zen (2017−2020) | Propus (2009−2011) |
| Release date | 30 July 2017 (7 years ago) | 21 September 2010 (14 years ago) |
| Launch price (MSRP) | $549 | $80 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Ryzen Threadripper 1900X has 17% better value for money than Athlon II X4 645.
Detailed specifications
Ryzen Threadripper 1900X and Athlon II X4 645 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 | 8 (Octa-Core) | 4 (Quad-Core) |
| Threads | 16 | 4 |
| Base clock speed | 3.8 GHz | 3.1 GHz |
| Boost clock speed | 3.8 GHz | 3.1 GHz |
| Bus rate | 4 × 8 GT/s | no data |
| Multiplier | 38 | no data |
| L1 cache | 768 KB | 128 KB (per core) |
| L2 cache | 4 MB | 512 KB (per core) |
| L3 cache | 16 MB | 0 KB |
| Chip lithography | 14 nm | 45 nm |
| Die size | 213 mm2 | 169 mm2 |
| Number of transistors | 9600 Million | 300 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Ryzen Threadripper 1900X and Athlon II X4 645 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 (Uniprocessor) | 1 |
| Socket | SP3r2 | AM3 |
| Power consumption (TDP) | 180 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen Threadripper 1900X and Athlon II X4 645. 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 1900X and Athlon II X4 645 are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen Threadripper 1900X and Athlon II X4 645. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 Quad-channel | DDR3 |
| Maximum memory size | 2 TiB | no data |
| Max memory channels | 4 | no data |
| Maximum memory bandwidth | 85.33 GB/s | no data |
| ECC memory support | + | - |
Peripherals
Specifications and connection of peripherals supported by Ryzen Threadripper 1900X and Athlon II X4 645.
| PCIe version | 3.0 | 2.0 |
| PCI Express lanes | 60 | no data |
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 | 10.98 | 1.53 |
| Recency | 30 July 2017 | 21 September 2010 |
| Physical cores | 8 | 4 |
| Threads | 16 | 4 |
| Chip lithography | 14 nm | 45 nm |
| Power consumption (TDP) | 180 Watt | 95 Watt |
Ryzen Threadripper 1900X has a 617.6% higher aggregate performance score, an age advantage of 6 years, 100% more physical cores and 300% more threads, and a 221.4% more advanced lithography process.
Athlon II X4 645, on the other hand, has 89.5% lower power consumption.
The Ryzen Threadripper 1900X is our recommended choice as it beats the Athlon II X4 645 in performance tests.
Should you still have questions on choice between Ryzen Threadripper 1900X and Athlon II X4 645, ask them in Comments section, and we shall answer.
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