AMD Athlon II X4 645 vs AMD Athlon II X4 651
Last updated:
CPU comparison with benchmarks
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| AMD Athlon II X4 645 | AMD Athlon II X4 651 | |
CPU comparisonAMD Athlon II X4 645 or AMD Athlon II X4 651 - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.
The AMD Athlon II X4 645 has 4 cores with 4 threads and clocks with a maximum frequency of 3.10 GHz. Up to 16 GB of memory is supported in 2 memory channels. The AMD Athlon II X4 645 was released in Q3/2010. The AMD Athlon II X4 651 has 4 cores with 4 threads and clocks with a maximum frequency of 3.00 GHz. The CPU supports up to 16 GB of memory in 2 memory channels. The AMD Athlon II X4 651 was released in Q4/2011. |
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| AMD Athlon II (52) | Family | AMD Athlon II (52) |
| AMD Athlon II X4 (Propus) (10) | CPU group | AMD Athlon II X4 (Llano) (5) |
| 1 | Generation | 2 |
| Propus | Architecture | Llano |
| Desktop / Server | Segment | Desktop / Server |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD Athlon II X4 645 is a 4 core processor with a clock frequency of 3.10 GHz. The AMD Athlon II X4 651 has 4 CPU cores with a clock frequency of 3.00 GHz. |
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| AMD Athlon II X4 645 | Characteristic | AMD Athlon II X4 651 |
| 4 | Cores | 4 |
| 4 | Threads | 4 |
| normal | Core architecture | normal |
| No | Hyperthreading | No |
| No | Overclocking ? | No |
| 3.10 GHz | Frequency | 3.00 GHz |
| -- | Turbo Frequency (1 Core) | -- |
| -- | Turbo Frequency (All Cores) | -- |
Memory & PCIeThe AMD Athlon II X4 645 supports a maximum of 16 GB of memory in 2 memory channels. The AMD Athlon II X4 651 can connect up to 16 GB of memory in 2 memory channels. |
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| AMD Athlon II X4 645 | Characteristic | AMD Athlon II X4 651 |
| DDR3-1333 | Memory | DDR3-1333 |
| 16 GB | Max. Memory | 16 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 21.3 GB/s | Max. Bandwidth | 21.3 GB/s |
| No | ECC | No |
| 2.00 MB | L2 Cache | 4.00 MB |
| -- | L3 Cache | -- |
| 2.0 | PCIe version | 2.0 |
| -- | PCIe lanes | -- |
| -- | PCIe Bandwidth | -- |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The AMD Athlon II X4 645 has a TDP of 95 W, that of the AMD Athlon II X4 651 is 100 W. |
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| AMD Athlon II X4 645 | Characteristic | AMD Athlon II X4 651 |
| 95 W | TDP (PL1 / PBP) | 100 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | -- |
| -- | Tjunction max. | -- |
Technical detailsThe AMD Athlon II X4 645 has a 2.00 MB cache, while the AMD Athlon II X4 651 cache has a total of 4.00 MB. |
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| AMD Athlon II X4 645 | Characteristic | AMD Athlon II X4 651 |
| 45 nm | Technology | 32 nm |
| Unknown | Chip design | Unknown |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| MMX, 3DNow!, SSE3, SSE4a | ISA extensions | MMX, 3DNow!, SSE3, SSE4a |
| AM3 | Socket | FM1 |
| AMD-V | Virtualization | AMD-V |
| No | AES-NI | No |
| Windows 10, Linux | Operating systems | Windows 10, Linux |
| Q3/2010 | Release date | Q4/2011 |
| -- | Release price | -- |
| show more data | show more data | |
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 1 CPU benchmarks
⌀ Multi core performance in 2 CPU benchmarks
Geekbench 5, 64bit (Single-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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Geekbench 5, 64bit (Multi-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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Estimated results for PassMark CPU Mark
Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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Cinebench R23 (Single-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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Cinebench R23 (Multi-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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Cinebench R20 (Single-Core)
Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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Cinebench R20 (Multi-Core)
Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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CPU-Z Benchmark 17 (Multi-Core)
The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
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AMD Athlon II X4 645
4C 4T @ 3.10 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 GHz |
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Devices using this processor |
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| AMD Athlon II X4 645 | AMD Athlon II X4 651 |
| Unknown | Unknown |
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