Qualcomm Snapdragon 821 vs Intel Core i7-6900K
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CPU comparison with benchmarks
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| Qualcomm Snapdragon 821 | Intel Core i7-6900K | |
CPU comparisonQualcomm Snapdragon 821 or Intel Core i7-6900K - 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 Core i7-6900K has 8 cores with 16 threads and clocks with a maximum frequency of 3.70 GHz. The CPU supports up to 128 GB of memory in 4 memory channels. The Intel Core i7-6900K was released in Q2/2016. |
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| Qualcomm Snapdragon (102) | Family | Intel Core i7 Extreme Edition (24) |
| Qualcomm Snapdragon 820 (3) | CPU group | Intel Core i 6000 (24) |
| 3 | Generation | 6 |
| Kryo | Architecture | Skylake S |
| Mobile | Segment | Desktop / Server |
| -- | 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 Core i7-6900K has 8 CPU cores with a clock frequency of 3.20 GHz (3.70 GHz). |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Core i7-6900K |
| 4 | Cores | 8 |
| 4 | Threads | 16 |
| hybrid (big.LITTLE) | Core architecture | normal |
| No | Hyperthreading | Yes |
| No | Overclocking ? | Yes |
| 2.40 GHz 2x Kryo |
A-Core | 3.20 GHz (3.70 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 Core i7-6900K |
| 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 | no iGPU |
| 0.62 GHz | GPU frequency | -- |
| 0.62 GHz | GPU (Turbo) | -- |
| 5 | GPU Generation | -- |
| 14 nm | Technology | |
| 0 | Max. displays | |
| -- | Compute units | -- |
| 256 | Shader | -- |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| -- | Max. GPU Memory | -- |
| 11,1 | DirectX Version | -- |
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 | no iGPU |
| Decode | Codec h265 / HEVC (8 bit) | No |
| No | Codec h265 / HEVC (10 bit) | No |
| Decode | Codec h264 | No |
| Decode | Codec VP9 | No |
| Decode | Codec VP8 | No |
| No | Codec AV1 | No |
| No | Codec AVC | No |
| Decode | Codec VC-1 | No |
| Decode | Codec JPEG | No |
Memory & PCIeThe Qualcomm Snapdragon 821 supports a maximum of 8 GB of memory in 2 memory channels. The Intel Core i7-6900K can connect up to 128 GB of memory in 4 memory channels. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Core i7-6900K |
| LPDDR4-3733 | Memory | DDR4-2400 |
| 8 GB | Max. Memory | 128 GB |
| 2 (Dual Channel) | Memory channels | 4 (Quad Channel) |
| 14.9 GB/s | Max. Bandwidth | 76.8 GB/s |
| No | ECC | No |
| -- | L2 Cache | -- |
| -- | L3 Cache | 20.00 MB |
| -- | PCIe version | 3.0 |
| -- | PCIe lanes | 40 |
| -- | PCIe Bandwidth | 39.4 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 Core i7-6900K is 140 W. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Core i7-6900K |
| -- | TDP (PL1 / PBP) | 140 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | -- |
| -- | Tjunction max. | -- |
Technical detailsThe Qualcomm Snapdragon 821 has a 0.00 MB cache, while the Intel Core i7-6900K cache has a total of 20.00 MB. |
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| Qualcomm Snapdragon 821 | Characteristic | Intel Core i7-6900K |
| 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, AVX2 |
| -- | Socket | LGA 2011-3 |
| None | Virtualization | VT-x, VT-x EPT, VT-d |
| No | AES-NI | Yes |
| Android | Operating systems | Windows 10, Linux |
| Q3/2016 | Release date | Q2/2016 |
| -- | Release price | -- |
| show more data | show more data | |
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4C 4T @ 2.40 GHz buy now on Amazon and save!
8C 16T @ 3.20 GHz (3.70 GHz) buy now on Amazon and save!
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 2 CPU benchmarks
⌀ Multi core performance in 3 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 Core i7-6900K
8C 16T @ 3.70 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 Core i7-6900K
8C 16T @ 3.20 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 Core i7-6900K
8C 16T @ 3.70 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 Core i7-6900K
8C 16T @ 3.20 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 Core i7-6900K
8C 16T @ 3.20 GHz |
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Cinebench R23 (Single-Core)
Cinebench R23 is the successor of Cinebench R20 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Core i7-6900K
8C 16T @ 3.70 GHz |
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Cinebench R23 (Multi-Core)
Cinebench R23 is the successor of Cinebench R20 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Core i7-6900K
8C 16T @ 3.20 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 Core i7-6900K
@ 0.00 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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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Intel Core i7-6900K
8C 16T @ 3.20 GHz |
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Devices using this processor |
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| Qualcomm Snapdragon 821 | Intel Core i7-6900K |
| Unknown | Unknown |
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