Qualcomm Snapdragon 7 Gen 3 vs Qualcomm Snapdragon 821
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CPU comparison with benchmarks
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| Qualcomm Snapdragon 7 Gen 3 | Qualcomm Snapdragon 821 | |
CPU comparisonQualcomm Snapdragon 7 Gen 3 or Qualcomm Snapdragon 821 - 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 7 Gen 3 has 8 cores with 8 threads and clocks with a maximum frequency of 2.63 GHz. Up to GB of memory is supported in 2 memory channels. The Qualcomm Snapdragon 7 Gen 3 was released in Q4/2023. The Qualcomm Snapdragon 821 has 4 cores with 4 threads and clocks with a maximum frequency of 2.40 GHz. The CPU supports up to 8 GB of memory in 2 memory channels. The Qualcomm Snapdragon 821 was released in Q3/2016. |
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| Qualcomm Snapdragon (103) | Family | Qualcomm Snapdragon (103) |
| Qualcomm Snapdragon 7 Gen 3 (1) | CPU group | Qualcomm Snapdragon 820 (3) |
| 3 | Generation | 3 |
| Kryo Prime, Gold, Silver | Architecture | Kryo |
| Mobile | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Qualcomm Snapdragon 7 Gen 3 has 8 CPU cores and can calculate 8 threads in parallel. The clock frequency of the Qualcomm Snapdragon 7 Gen 3 is 2.63 GHz while the Qualcomm Snapdragon 821 has 4 CPU cores and 4 threads can calculate simultaneously. The clock frequency of the Qualcomm Snapdragon 821 is at 2.40 GHz. |
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| Qualcomm Snapdragon 7 Gen 3 | Characteristic | Qualcomm Snapdragon 821 |
| 8 | Cores | 4 |
| 8 | Threads | 4 |
| hybrid (Prime / big.LITTLE) | Core architecture | hybrid (big.LITTLE) |
| No | Hyperthreading | No |
| No | Overclocking ? | No |
| 2.63 GHz 1x Cortex-A715 |
A-Core | 2.40 GHz 2x Kryo |
| 2.40 GHz 3x Cortex-A715 |
B-Core | 1.60 GHz 2x Kryo |
| 1.80 GHz 4x Cortex-A510 |
C-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 7 Gen 3 | Characteristic | Qualcomm Snapdragon 821 |
| Qualcomm AI engine | AI hardware | Qualcomm AI engine |
| Hexagon | AI specifications | Hexagon 680 |
| -- | NPU + CPU + iGPU | -- |
Integrated graphics (iGPU)The Qualcomm Snapdragon 7 Gen 3 or Qualcomm Snapdragon 821 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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| Qualcomm Adreno 720 | GPU | Qualcomm Adreno 530 |
| 0.44 GHz | GPU frequency | 0.62 GHz |
| 0.44 GHz | GPU (Turbo) | 0.62 GHz |
| -- | GPU Generation | 5 |
| 4 nm | Technology | 14 nm |
| 0 | Max. displays | 0 |
| -- | Compute units | -- |
| -- | Shader | 256 |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| -- | Max. GPU Memory | -- |
| 12.1 | DirectX Version | 11,1 |
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 720 | GPU | Qualcomm Adreno 530 |
| Decode / Encode | Codec h265 / HEVC (8 bit) | Decode |
| Decode / Encode | Codec h265 / HEVC (10 bit) | No |
| Decode / Encode | Codec h264 | Decode |
| Decode / Encode | Codec VP9 | Decode |
| Decode / Encode | Codec VP8 | Decode |
| No | Codec AV1 | No |
| Decode | Codec AVC | No |
| Decode | Codec VC-1 | Decode |
| Decode / Encode | Codec JPEG | Decode |
Memory & PCIeThe Qualcomm Snapdragon 7 Gen 3 can use up to GB of memory in 2 memory channels. The maximum memory bandwidth is 51.2 GB/s. The Qualcomm Snapdragon 821 supports up to 8 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 14.9 GB/s. |
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| Qualcomm Snapdragon 7 Gen 3 | Characteristic | Qualcomm Snapdragon 821 |
| LPDDR4X-4266, LPDDR5-6400 | Memory | LPDDR4-3733 |
| Max. Memory | 8 GB | |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 51.2 GB/s | Max. Bandwidth | 14.9 GB/s |
| No | ECC | No |
| -- | L2 Cache | -- |
| -- | L3 Cache | -- |
| -- | PCIe version | -- |
| -- | PCIe lanes | -- |
| -- | PCIe Bandwidth | -- |
Thermal ManagementThe thermal design power (TDP for short) of the Qualcomm Snapdragon 7 Gen 3 is --, while the Qualcomm Snapdragon 821 has a TDP of --. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| Qualcomm Snapdragon 7 Gen 3 | Characteristic | Qualcomm Snapdragon 821 |
| -- | TDP (PL1 / PBP) | -- |
| -- | TDP (PL2) | -- |
| -- | TDP up | -- |
| -- | TDP down | -- |
| -- | Tjunction max. | -- |
Technical detailsThe Qualcomm Snapdragon 7 Gen 3 is manufactured in 4 nm and has 0.00 MB cache. The Qualcomm Snapdragon 821 is manufactured in 14 nm and has a 0.00 MB cache. |
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| Qualcomm Snapdragon 7 Gen 3 | Characteristic | Qualcomm Snapdragon 821 |
| 4 nm | Technology | 14 nm |
| Chiplet | Chip design | Chiplet |
| Armv9-A (64 bit) | Instruction set (ISA) | Armv8-A (64 bit) |
| -- | ISA extensions | -- |
| -- | Socket | -- |
| None | Virtualization | None |
| No | AES-NI | No |
| Android, Windows 10/11 (ARM) | Operating systems | Android |
| Q4/2023 | Release date | Q3/2016 |
| -- | Release price | -- |
| show more data | show more data | |
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4C 4T @ 2.40 GHz buy now on Amazon and save!
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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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Qualcomm Snapdragon 7 Gen 3
8C 8T @ 2.63 GHz |
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Qualcomm Snapdragon 821
4C 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 7 Gen 3
8C 8T @ 2.63 GHz |
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Qualcomm Snapdragon 821
4C 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 7 Gen 3
8C 8T @ 2.63 GHz |
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Qualcomm Snapdragon 821
4C 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 7 Gen 3
8C 8T @ 2.63 GHz |
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Qualcomm Snapdragon 821
4C 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 7 Gen 3
Qualcomm Adreno 720 @ 0.44 GHz |
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Qualcomm Snapdragon 821
Qualcomm Adreno 530 @ 0.62 GHz |
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AnTuTu 10 Benchmark
The AnTuTu 10 benchmark is one of the best-known benchmarks for mobile processors, which is now available in version 10. There is a version for Android-based smartphones and tablets, as well as a version for Apple mobile devices, i.e. iPhones and iPads.
The Antutu 10 benchmark has 3 phases. In the first phase, the device's RAM is tested, in phase 2 the graphics are tested and in the final phase the entire device is pushed to its performance limits by rendering 3D graphics.
Antutu 10 is therefore ideal for comparing the performance of different devices.
The Antutu 10 benchmark has 3 phases. In the first phase, the device's RAM is tested, in phase 2 the graphics are tested and in the final phase the entire device is pushed to its performance limits by rendering 3D graphics.
Antutu 10 is therefore ideal for comparing the performance of different devices.
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Qualcomm Snapdragon 7 Gen 3
8C 8T @ 2.63 GHz |
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Qualcomm Snapdragon 821
4C 4T @ 2.40 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 7 Gen 3
8C 8T @ 2.63 GHz |
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Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz |
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Devices using this processor |
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| Qualcomm Snapdragon 7 Gen 3 | Qualcomm Snapdragon 821 |
| Unknown | Unknown |
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