i5-655K vs Athlon II X4 651K
Primary details
Comparing Athlon II X4 651K and Core i5-655K processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 2286 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | no data | 1.65 |
| Architecture codename | Llano (2011−2012) | Clarkdale (2010−2011) |
| Release date | 14 November 2011 (13 years ago) | 30 May 2010 (14 years ago) |
Detailed specifications
Athlon II X4 651K and Core i5-655K 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 | 4 |
| Base clock speed | 3 GHz | 3.2 GHz |
| Boost clock speed | 3 GHz | 3.46 GHz |
| Bus rate | no data | 2.5 GT/s |
| L1 cache | 128 KB (per core) | 64 KB (per core) |
| L2 cache | 1 MB (per core) | 256 KB (per core) |
| L3 cache | 0 KB | 4 MB (shared) |
| Chip lithography | 32 nm | 32 nm |
| Die size | 228 mm2 | 81 mm2 |
| Maximum core temperature | no data | 73 °C |
| Number of transistors | 1,178 million | 382 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | - | + |
Compatibility
Information on Athlon II X4 651K and Core i5-655K 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 | FCLGA1156 |
| Power consumption (TDP) | 100 Watt | 73 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Athlon II X4 651K and Core i5-655K. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.2 |
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Turbo Boost Technology | no data | 1.0 |
| Hyper-Threading Technology | no data | + |
| Idle States | no data | + |
| Demand Based Switching | no data | - |
| PAE | no data | 36 Bit |
| FDI | no data | + |
Security technologies
Athlon II X4 651K and Core i5-655K technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Athlon II X4 651K and Core i5-655K are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Athlon II X4 651K and Core i5-655K. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR3 |
| Maximum memory size | no data | 16.38 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 21 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® HD Graphics for Previous Generation Intel® Processors |
| Clear Video HD | no data | + |
Graphics interfaces
Available interfaces and connections of Athlon II X4 651K and Core i5-655K integrated GPUs.
| Number of displays supported | no data | 2 |
Peripherals
Specifications and connection of peripherals supported by Athlon II X4 651K and Core i5-655K.
| PCIe version | no data | 2.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Recency | 14 November 2011 | 30 May 2010 |
| Physical cores | 4 | 2 |
| Power consumption (TDP) | 100 Watt | 73 Watt |
Athlon II X4 651K has an age advantage of 1 year, and 100% more physical cores.
i5-655K, on the other hand, has 37% lower power consumption.
We couldn't decide between Athlon II X4 651K and Core i5-655K. We've got no test results to judge.
Should you still have questions on choice between Athlon II X4 651K and Core i5-655K, ask them in Comments section, and we shall answer.
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