Phenom II X4 945 (125W) vs Phenom II X2 550
Primary details
Comparing Phenom II X2 550 and Phenom II X4 945 (125W) processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2666 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.02 | no data |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 0.87 | no data |
| Architecture codename | Callisto (2009−2010) | Deneb (2009−2011) |
| Release date | 4 November 2009 (15 years ago) | 23 April 2009 (15 years ago) |
| Launch price (MSRP) | $133 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Phenom II X2 550 and Phenom II X4 945 (125W) 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) | 4 (Quad-Core) |
| Threads | 2 | 4 |
| Base clock speed | 3.1 GHz | 3 GHz |
| Boost clock speed | 3.1 GHz | 3 GHz |
| L1 cache | 128 KB (per core) | 128 KB (per core) |
| L2 cache | 512 KB (per core) | 512 KB (per core) |
| L3 cache | 6 MB (shared) | 6 MB (shared) |
| Chip lithography | 45 nm | 45 nm |
| Die size | 258 mm2 | 258 mm2 |
| Number of transistors | 758 million | 758 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Phenom II X2 550 and Phenom II X4 945 (125W) 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 | AM3 |
| Power consumption (TDP) | 80 Watt | 125 Watt |
Virtualization technologies
Virtual machine speed-up technologies supported by Phenom II X2 550 and Phenom II X4 945 (125W) are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X2 550 and Phenom II X4 945 (125W). Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | On certain motherboards (Chipset feature) |
Peripherals
Specifications and connection of peripherals supported by Phenom II X2 550 and Phenom II X4 945 (125W).
| PCIe version | 2.0 | 2.0 |
Pros & cons summary
| Recency | 4 November 2009 | 23 April 2009 |
| Physical cores | 2 | 4 |
| Threads | 2 | 4 |
| Power consumption (TDP) | 80 Watt | 125 Watt |
Phenom II X2 550 has an age advantage of 6 months, and 56.3% lower power consumption.
Phenom II X4 945 (125W), on the other hand, has 100% more physical cores and 100% more threads.
We couldn't decide between Phenom II X2 550 and Phenom II X4 945 (125W). We've got no test results to judge.
Should you still have questions on choice between Phenom II X2 550 and Phenom II X4 945 (125W), ask them in Comments section, and we shall answer.
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