AMD Phenom II X4 840T vs AMD Athlon II X4 651K
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CPU comparison with benchmarks
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| AMD Phenom II X4 840T | AMD Athlon II X4 651K | |
CPU comparisonAMD Phenom II X4 840T or AMD Athlon II X4 651K - 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 Phenom II X4 840T has 4 cores with 4 threads and clocks with a maximum frequency of 3.20 GHz. Up to GB of memory is supported in 2 memory channels. The AMD Phenom II X4 840T was released in Q3/2010. The AMD Athlon II X4 651K 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 651K was released in Q4/2011. |
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| AMD Phenom II (52) | Family | AMD Athlon II (52) |
| AMD Phenom II - 800/900 (23) | CPU group | AMD Athlon II X4 (Llano) (5) |
| 4 | Generation | 2 |
| Deneb (K10) | Architecture | Llano |
| Desktop / Server | Segment | Desktop / Server |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD Phenom II X4 840T is a 4 core processor with a clock frequency of 2.90 GHz (3.20 GHz). The AMD Athlon II X4 651K has 4 CPU cores with a clock frequency of 3.00 GHz. |
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| AMD Phenom II X4 840T | Characteristic | AMD Athlon II X4 651K |
| 4 | Cores | 4 |
| 4 | Threads | 4 |
| normal | Core architecture | normal |
| No | Hyperthreading | No |
| Yes | Overclocking ? | Yes |
| 2.90 GHz | Frequency | 3.00 GHz |
| 3.20 GHz | Turbo Frequency (1 Core) | -- |
| 3.20 GHz | Turbo Frequency (All Cores) | -- |
Memory & PCIeThe AMD Phenom II X4 840T supports a maximum of GB of memory in 2 memory channels. The AMD Athlon II X4 651K can connect up to 16 GB of memory in 2 memory channels. |
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| AMD Phenom II X4 840T | Characteristic | AMD Athlon II X4 651K |
| DDR3-1333, DDR2-1066 | Memory | DDR3-1333 |
| 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 |
| -- | L2 Cache | 4.00 MB |
| 6.00 MB | L3 Cache | -- |
| -- | PCIe version | 2.0 |
| -- | PCIe lanes | -- |
| -- | PCIe Bandwidth | -- |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The AMD Phenom II X4 840T has a TDP of 95 W, that of the AMD Athlon II X4 651K is 100 W. |
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| AMD Phenom II X4 840T | Characteristic | AMD Athlon II X4 651K |
| 95 W | TDP (PL1 / PBP) | 100 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | -- |
| -- | Tjunction max. | -- |
Technical detailsThe AMD Phenom II X4 840T has a 6.00 MB cache, while the AMD Athlon II X4 651K cache has a total of 4.00 MB. |
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| AMD Phenom II X4 840T | Characteristic | AMD Athlon II X4 651K |
| 45 nm | Technology | 32 nm |
| Unknown | Chip design | Unknown |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| 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 Phenom II X4 840T
4C 4T @ 3.20 GHz |
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AMD Athlon II X4 651K
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 Phenom II X4 840T
4C 4T @ 3.20 GHz |
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AMD Athlon II X4 651K
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 Phenom II X4 840T
4C 4T @ 3.20 GHz |
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AMD Athlon II X4 651K
4C 4T @ 3.00 GHz |
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Cinebench R15 (Single-Core)
Cinebench R15 is the successor of Cinebench 11.5 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 Phenom II X4 840T
4C 4T @ 3.20 GHz |
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AMD Athlon II X4 651K
4C 4T @ 3.00 GHz |
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Cinebench R15 (Multi-Core)
Cinebench R15 is the successor of Cinebench 11.5 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 Phenom II X4 840T
4C 4T @ 3.20 GHz |
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AMD Athlon II X4 651K
4C 4T @ 3.00 GHz |
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Devices using this processor |
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| AMD Phenom II X4 840T | AMD Athlon II X4 651K |
| Unknown | Unknown |
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