Phenom X4 9550 vs A8-3870K
Aggregate performance score
A8-3870K outperforms Phenom X4 9550 by a considerable 41% based on our aggregate benchmark results.
Primary details
Comparing A8-3870K and Phenom X4 9550 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2177 | 2446 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 1.39 | 1.04 |
| Architecture codename | Llano (2011−2012) | Agena (2007−2008) |
| Release date | 20 December 2011 (13 years ago) | March 2008 (16 years ago) |
Detailed specifications
A8-3870K and Phenom X4 9550 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 | 3 GHz | no data |
| Boost clock speed | 3 GHz | 2.2 GHz |
| L1 cache | 128 KB (per core) | 128 KB (per core) |
| L2 cache | 1 MB (per core) | 512 KB (per core) |
| L3 cache | 0 KB | 2 MB (shared) |
| Chip lithography | 32 nm | 65 nm |
| Die size | 228 mm2 | 285 mm2 |
| Number of transistors | 1,178 million | 450 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
Compatibility
Information on A8-3870K and Phenom X4 9550 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 | FM1 | AM2+ |
| Power consumption (TDP) | 100 Watt | 95 Watt |
Virtualization technologies
Virtual machine speed-up technologies supported by A8-3870K and Phenom X4 9550 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by A8-3870K and Phenom X4 9550. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon HD 6550D | 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.
Pros & cons summary
| Performance score | 1.47 | 1.04 |
| Chip lithography | 32 nm | 65 nm |
| Power consumption (TDP) | 100 Watt | 95 Watt |
A8-3870K has a 41.3% higher aggregate performance score, and a 103.1% more advanced lithography process.
Phenom X4 9550, on the other hand, has 5.3% lower power consumption.
The A8-3870K is our recommended choice as it beats the Phenom X4 9550 in performance tests.
Should you still have questions on choice between A8-3870K and Phenom X4 9550, ask them in Comments section, and we shall answer.
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