Athlon II X4 645 vs Phenom II X4 X920 BE
Aggregate performance score
Athlon II X4 645 outperforms Phenom II X4 X920 BE by a minimal 2% based on our aggregate benchmark results.
Primary details
Comparing Phenom II X4 X920 BE and Athlon II X4 645 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2138 | 2124 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 3.30 |
| Market segment | Laptop | Desktop processor |
| Series | 4x AMD Phenom II | no data |
| Power efficiency | 3.05 | 1.48 |
| Architecture codename | Champlain (2010−2011) | Propus (2009−2011) |
| Release date | 12 May 2010 (14 years ago) | 21 September 2010 (14 years ago) |
| Launch price (MSRP) | no data | $80 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Phenom II X4 X920 BE 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 | 4 (Quad-Core) | 4 (Quad-Core) |
| Threads | 4 | 4 |
| Base clock speed | no data | 3.1 GHz |
| Boost clock speed | 2.3 GHz | 3.1 GHz |
| Bus rate | 3600 MHz | no data |
| L1 cache | 256 KB | 128 KB (per core) |
| L2 cache | 2 MB | 512 KB (per core) |
| L3 cache | no data | 0 KB |
| Chip lithography | 45 nm | 45 nm |
| Die size | no data | 169 mm2 |
| Number of transistors | no data | 300 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Phenom II X4 X920 BE 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 | no data | 1 |
| Socket | S1 | AM3 |
| Power consumption (TDP) | 45 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X4 X920 BE and Athlon II X4 645. You'll probably need this information if you require some particular technology.
| Instruction set extensions | HyperTransport 3.0, Enhanced Virus Protection, AMD64, SSE4A, unlocked multiplier | no data |
| VirusProtect | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X4 X920 BE and Athlon II X4 645. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
Peripherals
Specifications and connection of peripherals supported by Phenom II X4 X920 BE and Athlon II X4 645.
| PCIe version | no data | 2.0 |
Pros & cons summary
| Performance score | 1.51 | 1.54 |
| Recency | 12 May 2010 | 21 September 2010 |
| Power consumption (TDP) | 45 Watt | 95 Watt |
Phenom II X4 X920 BE has 111.1% lower power consumption.
Athlon II X4 645, on the other hand, has a 2% higher aggregate performance score, and an age advantage of 4 months.
Given the minimal performance differences, no clear winner can be declared between Phenom II X4 X920 BE and Athlon II X4 645.
Be aware that Phenom II X4 X920 BE is a notebook processor while Athlon II X4 645 is a desktop one.
Should you still have questions on choice between Phenom II X4 X920 BE and Athlon II X4 645, ask them in Comments section, and we shall answer.
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