Qualcomm Snapdragon 8cx vs Qualcomm Snapdragon 855

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CPU comparison with benchmarks


Qualcomm Snapdragon 8cx CPU1 vs CPU2 Qualcomm Snapdragon 855
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 855

CPU comparison

In this CPU comparison, we compare the Qualcomm Snapdragon 8cx and the Qualcomm Snapdragon 855 and use benchmarks to check which processor is faster.

We compare the Qualcomm Snapdragon 8cx 8 core processor released in Q4/2018 with the Qualcomm Snapdragon 855 which has 8 CPU cores and was introduced in Q4/2018.
Qualcomm Snapdragon (102) Family Qualcomm Snapdragon (102)
Qualcomm Snapdragon 8cx (2) CPU group Qualcomm Snapdragon 855/860 (3)
2 Generation 6
Kryo 495 Architecture Kryo 485
Mobile Segment Mobile
-- Predecessor Qualcomm Snapdragon 845
-- Successor --

CPU Cores and Base Frequency

The Qualcomm Snapdragon 8cx is a 8 core processor with a clock frequency of 2.84 GHz. The processor can compute 8 threads at the same time. The Qualcomm Snapdragon 855 clocks with 2.84 GHz, has 8 CPU cores and can calculate 8 threads in parallel.

Qualcomm Snapdragon 8cx Characteristic Qualcomm Snapdragon 855
8 Cores 8
8 Threads 8
hybrid (big.LITTLE) Core architecture hybrid (Prime / big.LITTLE)
No Hyperthreading No
No Overclocking ? No
2.84 GHz
4x Kryo 495 Gold
A-Core 2.84 GHz
1x Kryo 485 Prime
1.80 GHz
4x Kryo 495 Silver
B-Core 2.42 GHz
3x Kryo 485 Gold
-- C-Core 1.80 GHz
4x Kryo 485 Silver

Artificial Intelligence and Machine Learning

Processors 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.

Qualcomm Snapdragon 8cx Characteristic Qualcomm Snapdragon 855
Qualcomm AI engine AI hardware Qualcomm AI engine
Hexagon 685 @ 3 TOPS AI specifications Hexagon 690 @ 7 TOPS

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

Qualcomm Adreno 680 GPU Qualcomm Adreno 640
0.25 GHz GPU frequency 0.25 GHz
0.59 GHz GPU (Turbo) 0.59 GHz
5 GPU Generation 5
7 nm Technology 7 nm
2 Max. displays 1
8 Compute units 4
768 Shader 384
No Hardware Raytracing No
No Frame Generation No
4 GB Max. GPU Memory 4 GB
12.0 DirectX Version 12.0

Hardware codec support

A 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.

Qualcomm Adreno 680 GPU Qualcomm Adreno 640
Decode / Encode Codec h265 / HEVC (8 bit) Decode / Encode
Decode / Encode Codec h265 / HEVC (10 bit) Decode / Encode
Decode / Encode Codec h264 Decode / Encode
Decode Codec VP9 Decode / Encode
Decode / Encode Codec VP8 Decode / Encode
No Codec AV1 No
Decode Codec AVC No
Decode Codec VC-1 No
Decode / Encode Codec JPEG No

Memory & PCIe

Up to 16 GB of memory in a maximum of 8 memory channels is supported by the Qualcomm Snapdragon 8cx, while the Qualcomm Snapdragon 855 supports a maximum of 16 GB of memory with a maximum memory bandwidth of 34.1 GB/s enabled.

Qualcomm Snapdragon 8cx Characteristic Qualcomm Snapdragon 855
LPDDR4X-4266 Memory LPDDR4X-4266
16 GB Max. Memory 16 GB
8 (Octa Channel) Memory channels 4 (Quad Channel)
68.2 GB/s Max. Bandwidth 34.1 GB/s
No ECC No
-- L2 Cache 1.75 MB
2.00 MB L3 Cache 2.00 MB
-- PCIe version --
-- PCIe lanes --
-- PCIe Bandwidth --

Thermal Management

The Qualcomm Snapdragon 8cx has a TDP of 7 W. The TDP of the Qualcomm Snapdragon 855 is --. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Qualcomm Snapdragon 8cx Characteristic Qualcomm Snapdragon 855
7 W TDP (PL1 / PBP) --
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Qualcomm Snapdragon 8cx has 2.00 MB cache and is manufactured in 7 nm. The cache of Qualcomm Snapdragon 855 is at 3.75 MB. The processor is manufactured in 7 nm.

Qualcomm Snapdragon 8cx Characteristic Qualcomm Snapdragon 855
7 nm Technology 7 nm
Chiplet Chip design Chiplet
Armv8-A (64 bit) Instruction set (ISA) Armv8-A (64 bit)
-- ISA extensions --
-- Socket --
None Virtualization None
No AES-NI No
Android, Windows 10 (ARM) Operating systems Android
Q4/2018 Release date Q4/2018
-- Release price --
show more data show more data


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Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
⌀ Multi core performance in 1 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.
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
8C 8T @ 2.84 GHz
724 (100%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
724 (100%)

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.
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
8C 8T @ 2.84 GHz
2808 (100%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
2578 (92%)

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.
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
Qualcomm Adreno 680 @ 0.59 GHz
1843 (100%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
Qualcomm Adreno 640 @ 0.59 GHz
899 (49%)

Performance for Artificial Intelligence (AI) and Machine Learning (ML)

Processors 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. The performance is given in the number (trillions) of arithmetic operations per second (TOPS).
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
8C 8T @ 2.84 GHz
3 (43%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
7 (100%)

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.
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
8C 8T @ 2.84 GHz
0 (0%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
960 (100%)

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.
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
8C 8T @ 2.84 GHz
0 (0%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
2819 (100%)

AnTuTu 8 Benchmark

The AnTuTu 8 Benchmark measures the performance of a SoC. AnTuTu benchmarks the CPU, GPU, Memory as well as the UX (User Experience) by simulating browser and app usage. AnTuTu can benchmark any ARM CPU that runs under Android or iOS. Devices may not be directly compareable if the benchmark has been performed under different operating systems.

In the AnTuTu 8 benchmark, the single-core performance of a processor is only slightly weighted. The evaluation consists of the multi-core performance of the processor, the speed of the RAM and the performance of the internal graphics.
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
8C 8T @ 2.84 GHz
0 (0%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
432560 (100%)

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.
Qualcomm Snapdragon 8cx Qualcomm Snapdragon 8cx
8C 8T @ 2.84 GHz
0 (0%)
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
4527 (100%)

Devices using this processor

Qualcomm Snapdragon 8cx Qualcomm Snapdragon 855
Lenovo Flex 5G
Lenovo Yoga C 5G
Samsung Galaxy Book S
OnePlus 7 Pro
OnePlus 7 Pro 5G
Sony Xperia 1
Sony Xperia 5
Xiaomi Mi 9
Oppo Reno 10x Zoom

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