Intel Core i7-965 vs AMD Phenom II X2 521
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CPU comparison with benchmarks
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| Intel Core i7-965 | AMD Phenom II X2 521 | |
CPU comparisonIntel Core i7-965 or AMD Phenom II X2 521 - 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 Intel Core i7-965 has 4 cores with 8 threads and clocks with a maximum frequency of 3.46 GHz. Up to 24 GB of memory is supported in 3 memory channels. The Intel Core i7-965 was released in Q4/2008. The AMD Phenom II X2 521 has 2 cores with 2 threads and clocks with a maximum frequency of 3.50 GHz. The CPU supports up to GB of memory in 2 memory channels. The AMD Phenom II X2 521 was released in Q2/2011. |
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| Intel Core i7 Extreme Edition (24) | Family | AMD Phenom II (52) |
| Intel Core i7 900 (7) | CPU group | AMD Phenom II - 500 (2) |
| 1 | Generation | 1 |
| Bloomfield | Architecture | Regor (K10) |
| Desktop / Server | Segment | Desktop / Server |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Intel Core i7-965 is a 4 core processor with a clock frequency of 3.20 GHz (3.46 GHz). The AMD Phenom II X2 521 has 2 CPU cores with a clock frequency of 3.50 GHz. |
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| Intel Core i7-965 | Characteristic | AMD Phenom II X2 521 |
| 4 | Cores | 2 |
| 8 | Threads | 2 |
| normal | Core architecture | normal |
| Yes | Hyperthreading | No |
| Yes | Overclocking ? | Yes |
| 3.20 GHz | Frequency | 3.50 GHz |
| 3.46 GHz | Turbo Frequency (1 Core) | -- |
| -- | Turbo Frequency (All Cores) | -- |
Memory & PCIeThe Intel Core i7-965 supports a maximum of 24 GB of memory in 3 memory channels. The AMD Phenom II X2 521 can connect up to GB of memory in 2 memory channels. |
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| Intel Core i7-965 | Characteristic | AMD Phenom II X2 521 |
| DDR3-1066 | Memory | DDR3-1333, DDR2-1066 |
| 24 GB | Max. Memory | |
| 3 | Memory channels | 2 (Dual Channel) |
| 25.6 GB/s | Max. Bandwidth | 21.3 GB/s |
| No | ECC | No |
| 1.00 MB | L2 Cache | -- |
| 8.00 MB | L3 Cache | 2.00 MB |
| -- | PCIe version | -- |
| -- | PCIe lanes | -- |
| -- | PCIe Bandwidth | -- |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i7-965 has a TDP of 130 W, that of the AMD Phenom II X2 521 is 65 W. |
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| Intel Core i7-965 | Characteristic | AMD Phenom II X2 521 |
| 130 W | TDP (PL1 / PBP) | 65 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | -- |
| -- | Tjunction max. | -- |
Technical detailsThe Intel Core i7-965 has a 9.00 MB cache, while the AMD Phenom II X2 521 cache has a total of 2.00 MB. |
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| Intel Core i7-965 | Characteristic | AMD Phenom II X2 521 |
| 45 nm | Technology | 45 nm |
| Monolithic | Chip design | Unknown |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4.1, SSE4.2 | ISA extensions | SSE3, SSE4a |
| LGA 1366 | Socket | AM3 |
| VT-x, VT-x EPT | Virtualization | AMD-V |
| No | AES-NI | No |
| Windows 10, Linux | Operating systems | Windows 10, Linux |
| Q4/2008 | Release date | Q2/2011 |
| 990 $ | Release price | 35 $ |
| show more data | show more data | |
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4C 8T @ 3.20 GHz (3.46 GHz) buy now on Amazon and save!
2C 2T @ 3.50 GHz buy now on Amazon and save!
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Average performance in benchmarks
⌀ Single core performance in 0 CPU benchmarks
⌀ Multi core performance in 1 CPU benchmarks
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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Intel Core i7-965
4C 8T @ 3.20 GHz |
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AMD Phenom II X2 521
2C 2T @ 3.50 GHz |
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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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Intel Core i7-965
4C 8T @ 3.46 GHz |
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AMD Phenom II X2 521
2C 2T @ 3.50 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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Intel Core i7-965
4C 8T @ 3.20 GHz |
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AMD Phenom II X2 521
2C 2T @ 3.50 GHz |
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Geekbench 6 (Single-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
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Intel Core i7-965
4C 8T @ 3.46 GHz |
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AMD Phenom II X2 521
2C 2T @ 3.50 GHz |
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Geekbench 6 (Multi-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
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Intel Core i7-965
4C 8T @ 3.20 GHz |
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AMD Phenom II X2 521
2C 2T @ 3.50 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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Intel Core i7-965
4C 8T @ 3.46 GHz |
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AMD Phenom II X2 521
2C 2T @ 3.50 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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Intel Core i7-965
4C 8T @ 3.20 GHz |
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AMD Phenom II X2 521
2C 2T @ 3.50 GHz |
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Devices using this processor |
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| Intel Core i7-965 | AMD Phenom II X2 521 |
| Unknown | Unknown |
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