AMD Athlon II X4 651 vs Intel Core Ultra 5 135U
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CPU comparison with benchmarks
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| AMD Athlon II X4 651 | Intel Core Ultra 5 135U | |
CPU comparisonAMD Athlon II X4 651 or Intel Core Ultra 5 135U - 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 651 has 4 cores with 4 threads and clocks with a maximum frequency of 3.00 GHz. Up to 16 GB of memory is supported in 2 memory channels. The AMD Athlon II X4 651 was released in Q4/2011. The Intel Core Ultra 5 135U has 12 cores with 14 threads and clocks with a maximum frequency of 4.40 GHz. The CPU supports up to 96 GB of memory in 2 memory channels. The Intel Core Ultra 5 135U was released in Q4/2023. |
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| AMD Athlon II (52) | Family | Intel Core Ultra 5 (10) |
| AMD Athlon II X4 (Llano) (5) | CPU group | Intel Core Ultra 100U (7) |
| 2 | Generation | 1 |
| Llano | Architecture | Meteor Lake U |
| Desktop / Server | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD Athlon II X4 651 has 4 CPU cores and can calculate 4 threads in parallel. The clock frequency of the AMD Athlon II X4 651 is 3.00 GHz while the Intel Core Ultra 5 135U has 12 CPU cores and 14 threads can calculate simultaneously. The clock frequency of the Intel Core Ultra 5 135U is at 1.60 GHz (4.40 GHz). |
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| AMD Athlon II X4 651 | Characteristic | Intel Core Ultra 5 135U |
| 4 | Cores | 12 |
| 4 | Threads | 14 |
| normal | Core architecture | hybrid (big.LITTLE) |
| No | Hyperthreading | Yes |
| No | Overclocking ? | No |
| 3.00 GHz | A-Core | 1.60 GHz (4.40 GHz) 2x Redwood Cove |
| -- | B-Core | 1.10 GHz (3.60 GHz) 8x Crestmont |
| -- | C-Core | 0.70 GHz (2.10 GHz) 2x Crestmont |
Artificial Intelligence and Machine LearningProcessors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor. |
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| AMD Athlon II X4 651 | Characteristic | Intel Core Ultra 5 135U |
| -- | AI hardware | Intel AI engine |
| -- | AI specifications | Intel AI Boost @ 1.4 GHz (OpenVINO, WindowsML, DirectML, ONNX RT) |
Internal GraphicsThe AMD Athlon II X4 651 or Intel Core Ultra 5 135U has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die. |
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| no iGPU | GPU | Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) |
| GPU frequency | 0.60 GHz | |
| -- | GPU (Turbo) | 1.90 GHz |
| -- | GPU Generation | -- |
| Technology | 5 nm | |
| Max. displays | 4 | |
| -- | Compute units | 64 |
| -- | Shader | 512 |
| No | Hardware Raytracing | Yes |
| No | Frame Generation | No |
| -- | Max. GPU Memory | 32 GB |
| -- | DirectX Version | 12.2 |
Hardware codec supportA photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos. |
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| no iGPU | GPU | Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) |
| No | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| No | Codec h264 | Decode / Encode |
| No | Codec VP9 | Decode |
| No | Codec VP8 | Decode |
| No | Codec AV1 | Decode / Encode |
| No | Codec AVC | Decode / Encode |
| No | Codec VC-1 | Decode |
| No | Codec JPEG | Decode / Encode |
Memory & PCIeThe AMD Athlon II X4 651 can use up to 16 GB of memory in 2 memory channels. The maximum memory bandwidth is 21.3 GB/s. The Intel Core Ultra 5 135U supports up to 96 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 120.0 GB/s. |
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| AMD Athlon II X4 651 | Characteristic | Intel Core Ultra 5 135U |
| DDR3-1333 | Memory | LPDDR5X-7500, DDR5-5600 |
| 16 GB | Max. Memory | 96 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 21.3 GB/s | Max. Bandwidth | 120.0 GB/s |
| No | ECC | No |
| 4.00 MB | L2 Cache | 12.00 MB |
| -- | L3 Cache | -- |
| 2.0 | PCIe version | 4.0 |
| -- | PCIe lanes | 20 |
| -- | PCIe Bandwidth | 39.4 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the AMD Athlon II X4 651 is 100 W, while the Intel Core Ultra 5 135U has a TDP of 15 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| AMD Athlon II X4 651 | Characteristic | Intel Core Ultra 5 135U |
| 100 W | TDP (PL1 / PBP) | 15 W |
| -- | TDP (PL2) | 57 W |
| -- | TDP up | 28 W |
| -- | TDP down | 12 W |
| -- | Tjunction max. | 110 °C |
Technical detailsThe AMD Athlon II X4 651 is manufactured in 32 nm and has 4.00 MB cache. The Intel Core Ultra 5 135U is manufactured in 7 nm and has a 12.00 MB cache. |
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| AMD Athlon II X4 651 | Characteristic | Intel Core Ultra 5 135U |
| 32 nm | Technology | 7 nm |
| Unknown | Chip design | Chiplet |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| MMX, 3DNow!, SSE3, SSE4a | ISA extensions | SSE4.1, SSE4.2, AVX2 |
| FM1 | Socket | BGA 2049 |
| AMD-V | Virtualization | VT-x, VT-x EPT, VT-d |
| No | AES-NI | Yes |
| Windows 10, Linux | Operating systems | Windows 11, Linux |
| Q4/2011 | Release date | Q4/2023 |
| -- | Release price | -- |
| show more data | show more data | |
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Rate these processors
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 651
4C 4T @ 3.00 GHz |
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Intel Core Ultra 5 135U
12C 14T @ 4.40 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 651
4C 4T @ 3.00 GHz |
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Intel Core Ultra 5 135U
12C 14T @ 1.60 GHz |
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iGPU - FP32 Performance (Single-precision GFLOPS)
The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
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AMD Athlon II X4 651
@ 0.00 GHz |
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Intel Core Ultra 5 135U
Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) @ 1.90 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 651
4C 4T @ 3.00 GHz |
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Intel Core Ultra 5 135U
12C 14T @ 1.60 GHz |
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Devices using this processor |
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| AMD Athlon II X4 651 | Intel Core Ultra 5 135U |
| Unknown | Unknown |
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