Phenom II X2 X620 BE vs Athlon II X4 645
Primary details
Comparing Athlon II X4 645 and Phenom II X2 X620 BE processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2149 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 3.30 | no data |
| Market segment | Desktop processor | Laptop |
| Series | no data | 2x AMD Phenom II |
| Power efficiency | 1.47 | no data |
| Architecture codename | Propus (2009−2011) | Champlain (2010−2011) |
| Release date | 21 September 2010 (14 years ago) | 12 May 2010 (14 years ago) |
| Launch price (MSRP) | $80 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Athlon II X4 645 and Phenom II X2 X620 BE 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) | 2 (Dual-core) |
| Threads | 4 | 2 |
| Base clock speed | 3.1 GHz | no data |
| Boost clock speed | 3.1 GHz | 3.1 GHz |
| Bus rate | no data | 3600 MHz |
| L1 cache | 128 KB (per core) | no data |
| L2 cache | 512 KB (per core) | 2 MB |
| L3 cache | 0 KB | no data |
| Chip lithography | 45 nm | 45 nm |
| Die size | 169 mm2 | no data |
| Number of transistors | 300 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Athlon II X4 645 and Phenom II X2 X620 BE 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 | no data |
| Socket | AM3 | S1 |
| Power consumption (TDP) | 95 Watt | 45 Watt |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon II X4 645 and Phenom II X2 X620 BE. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | no data |
Peripherals
Specifications and connection of peripherals supported by Athlon II X4 645 and Phenom II X2 X620 BE.
| PCIe version | 2.0 | no data |
Pros & cons summary
| Recency | 21 September 2010 | 12 May 2010 |
| Physical cores | 4 | 2 |
| Threads | 4 | 2 |
| Power consumption (TDP) | 95 Watt | 45 Watt |
Athlon II X4 645 has an age advantage of 4 months, and 100% more physical cores and 100% more threads.
Phenom II X2 X620 BE, on the other hand, has 111.1% lower power consumption.
We couldn't decide between Athlon II X4 645 and Phenom II X2 X620 BE. We've got no test results to judge.
Note that Athlon II X4 645 is a desktop processor while Phenom II X2 X620 BE is a notebook one.
Should you still have questions on choice between Athlon II X4 645 and Phenom II X2 X620 BE, ask them in Comments section, and we shall answer.
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