Qualcomm Snapdragon 855 vs AMD Phenom II X2 511

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CPU comparison with benchmarks


Qualcomm Snapdragon 855 CPU1 vs CPU2 AMD Phenom II X2 511
Qualcomm Snapdragon 855 AMD Phenom II X2 511

CPU comparison

Qualcomm Snapdragon 855 or AMD Phenom II X2 511 - 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 855 has 8 cores with 8 threads and clocks with a maximum frequency of 2.84 GHz. Up to 16 GB of memory is supported in 4 memory channels. The Qualcomm Snapdragon 855 was released in Q4/2018.

The AMD Phenom II X2 511 has 2 cores with 2 threads and clocks with a maximum frequency of 3.40 GHz. The CPU supports up to GB of memory in 2 memory channels. The AMD Phenom II X2 511 was released in Q1/2011.
Qualcomm Snapdragon (102) Family AMD Phenom II (52)
Qualcomm Snapdragon 855/860 (3) CPU group AMD Phenom II - 500 (2)
6 Generation 1
Kryo 485 Architecture Regor (K10)
Mobile Segment Desktop / Server
Qualcomm Snapdragon 845 Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Qualcomm Snapdragon 855 is a 8 core processor with a clock frequency of 2.84 GHz. The AMD Phenom II X2 511 has 2 CPU cores with a clock frequency of 3.40 GHz.

Qualcomm Snapdragon 855 Characteristic AMD Phenom II X2 511
8 Cores 2
8 Threads 2
hybrid (Prime / big.LITTLE) Core architecture normal
No Hyperthreading No
No Overclocking ? Yes
2.84 GHz
1x Kryo 485 Prime
A-Core 3.40 GHz
2.42 GHz
3x Kryo 485 Gold
B-Core --
1.80 GHz
4x Kryo 485 Silver
C-Core --

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 855 Characteristic AMD Phenom II X2 511
Qualcomm AI engine AI hardware --
Hexagon 690 @ 7 TOPS AI specifications --

Internal Graphics

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.

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

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

Memory & PCIe

The Qualcomm Snapdragon 855 supports a maximum of 16 GB of memory in 4 memory channels. The AMD Phenom II X2 511 can connect up to GB of memory in 2 memory channels.

Qualcomm Snapdragon 855 Characteristic AMD Phenom II X2 511
LPDDR4X-4266 Memory DDR3-1333, DDR2-1066
16 GB Max. Memory
4 (Quad Channel) Memory channels 2 (Dual Channel)
34.1 GB/s Max. Bandwidth 21.3 GB/s
No ECC No
1.75 MB L2 Cache --
2.00 MB L3 Cache 2.00 MB
-- PCIe version --
-- PCIe lanes --
-- PCIe Bandwidth --

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Qualcomm Snapdragon 855 has a TDP of --, that of the AMD Phenom II X2 511 is 65 W.

Qualcomm Snapdragon 855 Characteristic AMD Phenom II X2 511
-- TDP (PL1 / PBP) 65 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Qualcomm Snapdragon 855 has a 3.75 MB cache, while the AMD Phenom II X2 511 cache has a total of 2.00 MB.

Qualcomm Snapdragon 855 Characteristic AMD Phenom II X2 511
7 nm Technology 45 nm
Chiplet Chip design Unknown
Armv8-A (64 bit) Instruction set (ISA) x86-64 (64 bit)
-- ISA extensions SSE3, SSE4a
-- Socket AM3
None Virtualization AMD-V
No AES-NI No
Android Operating systems Windows 10, Linux
Q4/2018 Release date Q1/2011
-- Release price --
show more data show more data


Rate these processors

Here you can rate the Qualcomm Snapdragon 855 to help other visitors make their purchasing decisions. The average rating is 4.2 stars (5 ratings). Rate now:
Here you can rate the AMD Phenom II X2 511 to help other visitors make their purchasing decisions. The average rating is 0 stars (0 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 0 CPU benchmarks
⌀ Multi core performance in 1 CPU benchmarks

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 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
4527 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
2188 (48%)

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 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
724 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
0 (0%)

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 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
2578 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
0 (0%)

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 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
960 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
0 (0%)

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 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
2819 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
0 (0%)

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 855 Qualcomm Snapdragon 855
Qualcomm Adreno 640 @ 0.59 GHz
899 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
@ 0.00 GHz
0 (0%)

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 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
432560 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
0 (0%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 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.
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
0 (0%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
89 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 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.
Qualcomm Snapdragon 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
0 (0%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
172 (100%)

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 855 Qualcomm Snapdragon 855
8C 8T @ 2.84 GHz
7 (100%)
AMD Phenom II X2 511 AMD Phenom II X2 511
2C 2T @ 3.40 GHz
0 (0%)

Devices using this processor

Qualcomm Snapdragon 855 AMD Phenom II X2 511
OnePlus 7 Pro
OnePlus 7 Pro 5G
Sony Xperia 1
Sony Xperia 5
Xiaomi Mi 9
Oppo Reno 10x Zoom
Unknown

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