Ryzen 9 7945HX vs Athlon II X2 255
Aggregate performance score
Ryzen 9 7945HX outperforms Athlon II X2 255 by a whopping 4550% based on our aggregate benchmark results.
Primary details
Comparing Athlon II X2 255 and Ryzen 9 7945HX processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2664 | 110 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.02 | no data |
| Market segment | Desktop processor | Laptop |
| Power efficiency | 1.08 | 59.21 |
| Architecture codename | Regor (2009−2013) | Dragon Range-HX (Zen 4) (2023−2024) |
| Release date | 25 January 2010 (14 years ago) | 4 January 2023 (1 year ago) |
| Launch price (MSRP) | $60 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Athlon II X2 255 and Ryzen 9 7945HX 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 | 2 (Dual-core) | 16 (Hexadeca-Core) |
| Threads | 2 | 32 |
| Base clock speed | 3.1 GHz | 2.5 GHz |
| Boost clock speed | 3.1 GHz | 5.4 GHz |
| L1 cache | 128 KB | 64K (per core) |
| L2 cache | 1 MB | 1 MB (per core) |
| L3 cache | 0 KB | 64 MB (shared) |
| Chip lithography | 45 nm | CCD = 5 nm, I/O = 6 nm |
| Die size | 117 mm2 | 2x 71 mm2 |
| Maximum core temperature | no data | 100 °C |
| Number of transistors | 410 million | 13,140 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Athlon II X2 255 and Ryzen 9 7945HX 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 | FL1 |
| Power consumption (TDP) | 65 Watt | 55 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Athlon II X2 255 and Ryzen 9 7945HX. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME |
| AES-NI | - | + |
| FMA | - | + |
| AVX | - | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon II X2 255 and Ryzen 9 7945HX are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon II X2 255 and Ryzen 9 7945HX. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | AMD Radeon 610M (400 - 2200 MHz) |
Peripherals
Specifications and connection of peripherals supported by Athlon II X2 255 and Ryzen 9 7945HX.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | no data | 28 |
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 | 0.74 | 34.41 |
| Recency | 25 January 2010 | 4 January 2023 |
| Physical cores | 2 | 16 |
| Threads | 2 | 32 |
| Power consumption (TDP) | 65 Watt | 55 Watt |
Ryzen 9 7945HX has a 4550% higher aggregate performance score, an age advantage of 12 years, 700% more physical cores and 1500% more threads, and 18.2% lower power consumption.
The Ryzen 9 7945HX is our recommended choice as it beats the Athlon II X2 255 in performance tests.
Note that Athlon II X2 255 is a desktop processor while Ryzen 9 7945HX is a notebook one.
Should you still have questions on choice between Athlon II X2 255 and Ryzen 9 7945HX, ask them in Comments section, and we shall answer.
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