Intel Core i7-975 vs AMD Athlon II X4 651
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CPU comparison with benchmarks
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| Intel Core i7-975 | AMD Athlon II X4 651 | |
CPU comparisonIntel Core i7-975 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 Intel Core i7-975 has 4 cores with 8 threads and clocks with a maximum frequency of 3.60 GHz. Up to 24 GB of memory is supported in 3 memory channels. The Intel Core i7-975 was released in Q4/2008. 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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| Intel Core i7 Extreme Edition (24) | Family | AMD Athlon II (52) |
| Intel Core i7 900 (7) | CPU group | AMD Athlon II X4 (Llano) (5) |
| 1 | Generation | 2 |
| Bloomfield | Architecture | Llano |
| Desktop / Server | Segment | Desktop / Server |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Intel Core i7-975 has 4 CPU cores and can calculate 8 threads in parallel. The clock frequency of the Intel Core i7-975 is 3.33 GHz (3.60 GHz) while the AMD Athlon II X4 651 has 4 CPU cores and 4 threads can calculate simultaneously. The clock frequency of the AMD Athlon II X4 651 is at 3.00 GHz. |
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| Intel Core i7-975 | Characteristic | AMD Athlon II X4 651 |
| 4 | Cores | 4 |
| 8 | Threads | 4 |
| normal | Core architecture | normal |
| Yes | Hyperthreading | No |
| Yes | Overclocking ? | No |
| 3.33 GHz | Frequency | 3.00 GHz |
| 3.60 GHz | Turbo Frequency (1 Core) | -- |
| -- | Turbo Frequency (All Cores) | -- |
Memory & PCIeThe Intel Core i7-975 can use up to 24 GB of memory in 3 memory channels. The maximum memory bandwidth is 25.6 GB/s. The AMD Athlon II X4 651 supports up to 16 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 21.3 GB/s. |
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| Intel Core i7-975 | Characteristic | AMD Athlon II X4 651 |
| DDR3-1066 | Memory | DDR3-1333 |
| 24 GB | Max. Memory | 16 GB |
| 3 | Memory channels | 2 (Dual Channel) |
| 25.6 GB/s | Max. Bandwidth | 21.3 GB/s |
| No | ECC | No |
| 1.00 MB | L2 Cache | 4.00 MB |
| 8.00 MB | L3 Cache | -- |
| -- | PCIe version | 2.0 |
| -- | PCIe lanes | -- |
| -- | PCIe Bandwidth | -- |
Thermal ManagementThe thermal design power (TDP for short) of the Intel Core i7-975 is 130 W, while the AMD Athlon II X4 651 has a TDP of 100 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| Intel Core i7-975 | Characteristic | AMD Athlon II X4 651 |
| 130 W | TDP (PL1 / PBP) | 100 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | -- |
| -- | Tjunction max. | -- |
Technical detailsThe Intel Core i7-975 is manufactured in 45 nm and has 9.00 MB cache. The AMD Athlon II X4 651 is manufactured in 32 nm and has a 4.00 MB cache. |
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| Intel Core i7-975 | Characteristic | AMD Athlon II X4 651 |
| 45 nm | Technology | 32 nm |
| Monolithic | Chip design | Unknown |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4.1, SSE4.2 | ISA extensions | MMX, 3DNow!, SSE3, SSE4a |
| LGA 1366 | Socket | FM1 |
| VT-x, VT-x EPT | Virtualization | AMD-V |
| No | AES-NI | No |
| Windows 10, Linux | Operating systems | Windows 10, Linux |
| Q4/2008 | Release date | Q4/2011 |
| 1059 $ | 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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Intel Core i7-975
4C 8T @ 3.60 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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Intel Core i7-975
4C 8T @ 3.33 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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Intel Core i7-975
4C 8T @ 3.33 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 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 i7-975
4C 8T @ 3.60 GHz |
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AMD Athlon II X4 651
4C 4T @ 3.00 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 i7-975
4C 8T @ 3.33 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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Intel Core i7-975
4C 8T @ 3.33 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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| Intel Core i7-975 | AMD Athlon II X4 651 |
| Unknown | Unknown |
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