Qualcomm Snapdragon 821 vs Intel Pentium Gold 6405U
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CPU comparison with benchmarks
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| Qualcomm Snapdragon 821 | Intel Pentium Gold 6405U | |
CPU comparisonQualcomm Snapdragon 821 or Intel Pentium Gold 6405U - 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 Qualcomm Snapdragon 821 has 4 cores with 4 threads and clocks with a maximum frequency of 2.40 GHz. Up to 8 GB of memory is supported in 2 memory channels. The Qualcomm Snapdragon 821 was released in Q3/2016. The Intel Pentium Gold 6405U has 2 cores with 4 threads and clocks with a maximum frequency of 2.40 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The Intel Pentium Gold 6405U was released in Q4/2019. |
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| Qualcomm Snapdragon (104) | Family | Intel Pentium (150) |
| Qualcomm Snapdragon 820 (3) | CPU group | Intel Pentium 6000 (1) |
| 3 | Generation | 10 |
| Kryo | Architecture | Comet Lake U |
| Mobile | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Qualcomm Snapdragon 821 is a 4 core processor with a clock frequency of 2.40 GHz. The Intel Pentium Gold 6405U has 2 CPU cores with a clock frequency of 2.40 GHz. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Pentium Gold 6405U |
| 4 | Cores | 2 |
| 4 | Threads | 4 |
| hybrid (big.LITTLE) | Core architecture | normal |
| No | Hyperthreading | Yes |
| No | Overclocking ? | No |
| 2.40 GHz 2x Kryo |
A-Core | 2.40 GHz |
| 1.60 GHz 2x Kryo |
B-Core | -- |
NPU AI performanceThe performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Pentium Gold 6405U |
| Qualcomm AI engine | AI hardware | -- |
| Hexagon 680 | AI specifications | -- |
| -- | NPU + CPU + iGPU | -- |
Integrated graphics (iGPU)The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs. |
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| Qualcomm Adreno 530 | GPU | Intel UHD Graphics 610 |
| 0.62 GHz | GPU frequency | 0.30 GHz |
| 0.62 GHz | GPU (Turbo) | 0.95 GHz |
| 5 | GPU Generation | 9.5 |
| 14 nm | Technology | 14 nm |
| 0 | Max. displays | 3 |
| -- | Compute units | 12 |
| 256 | Shader | 96 |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| -- | Max. GPU Memory | 32 GB |
| 11,1 | DirectX Version | 12 |
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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| Qualcomm Adreno 530 | GPU | Intel UHD Graphics 610 |
| Decode | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| Decode | Codec h264 | Decode / Encode |
| Decode | Codec VP9 | Decode / Encode |
| Decode | Codec VP8 | Decode / Encode |
| No | Codec AV1 | No |
| No | Codec AVC | Decode / Encode |
| Decode | Codec VC-1 | Decode |
| Decode | Codec JPEG | Decode / Encode |
Memory & PCIeThe Qualcomm Snapdragon 821 supports a maximum of 8 GB of memory in 2 memory channels. The Intel Pentium Gold 6405U can connect up to 64 GB of memory in 2 memory channels. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Pentium Gold 6405U |
| LPDDR4-3733 | Memory | LPDDR3-2133, DDR4-2400 |
| 8 GB | Max. Memory | 64 GB |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 14.9 GB/s | Max. Bandwidth | 38.4 GB/s |
| No | ECC | No |
| -- | L2 Cache | -- |
| -- | L3 Cache | 2.00 MB |
| -- | PCIe version | 2.0 |
| -- | PCIe lanes | 12 |
| -- | PCIe Bandwidth | 6.0 GB/s |
Thermal ManagementThe TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Qualcomm Snapdragon 821 has a TDP of --, that of the Intel Pentium Gold 6405U is 15 W. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Pentium Gold 6405U |
| -- | TDP (PL1 / PBP) | 15 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | 12.5 W |
| -- | Tjunction max. | 100 °C |
Technical detailsThe Qualcomm Snapdragon 821 has a 0.00 MB cache, while the Intel Pentium Gold 6405U cache has a total of 2.00 MB. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Pentium Gold 6405U |
| 14 nm | Technology | 14 nm |
| Chiplet | Chip design | Monolithic |
| Armv8-A (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| -- | ISA extensions | SSE4.1, SSE4.2 |
| -- | Socket | BGA 1528 |
| None | Virtualization | VT-x, VT-x EPT, VT-d |
| No | AES-NI | Yes |
| Android | Operating systems | Windows 10, Windows 11, Linux |
| Q3/2016 | Release date | Q4/2019 |
| -- | Release price | 193 $ |
| 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Pentium Gold 6405U
2C 4T @ 2.40 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Pentium Gold 6405U
2C 4T @ 2.40 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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Qualcomm Snapdragon 821
Qualcomm Adreno 530 @ 0.62 GHz |
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Intel Pentium Gold 6405U
Intel UHD Graphics 610 @ 0.95 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Pentium Gold 6405U
2C 4T @ 2.40 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Pentium Gold 6405U
2C 4T @ 2.40 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Pentium Gold 6405U
2C 4T @ 2.40 GHz |
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Devices using this processor |
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| Qualcomm Snapdragon 821 | Intel Pentium Gold 6405U |
| Unknown | Lenovo Ideapad 3 17IML05 |
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