AMD Athlon II X4 635 vs Qualcomm Snapdragon 820

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CPU comparison with benchmarks


AMD Athlon II X4 635 CPU1 vs CPU2 Qualcomm Snapdragon 820
AMD Athlon II X4 635 Qualcomm Snapdragon 820

CPU comparison

AMD Athlon II X4 635 or Qualcomm Snapdragon 820 - 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 AMD Athlon II X4 635 has 4 cores with 4 threads and clocks with a maximum frequency of 2.90 GHz. Up to 16 GB of memory is supported in 2 memory channels. The AMD Athlon II X4 635 was released in Q1/2010.

The Qualcomm Snapdragon 820 has 4 cores with 4 threads and clocks with a maximum frequency of 2.15 GHz. The CPU supports up to 12 GB of memory in 4 memory channels. The Qualcomm Snapdragon 820 was released in Q4/2015.
AMD Athlon II (52) Family Qualcomm Snapdragon (102)
AMD Athlon II X4 (Propus) (10) CPU group Qualcomm Snapdragon 820 (3)
1 Generation 3
Propus Architecture Kryo
Desktop / Server Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Athlon II X4 635 has 4 CPU cores and can calculate 4 threads in parallel. The clock frequency of the AMD Athlon II X4 635 is 2.90 GHz while the Qualcomm Snapdragon 820 has 4 CPU cores and 4 threads can calculate simultaneously. The clock frequency of the Qualcomm Snapdragon 820 is at 2.15 GHz.

AMD Athlon II X4 635 Characteristic Qualcomm Snapdragon 820
4 Cores 4
4 Threads 4
normal Core architecture hybrid (big.LITTLE)
No Hyperthreading No
No Overclocking ? No
2.90 GHz A-Core 2.15 GHz
2x Kryo
-- B-Core 1.60 GHz
2x Kryo

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.

AMD Athlon II X4 635 Characteristic Qualcomm Snapdragon 820
-- AI hardware Qualcomm AI engine
-- AI specifications Hexagon 680

Internal Graphics

The AMD Athlon II X4 635 or Qualcomm Snapdragon 820 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.

no iGPU GPU Qualcomm Adreno 530
GPU frequency 0.62 GHz
-- GPU (Turbo) 0.62 GHz
-- GPU Generation 5
Technology 14 nm
Max. displays 0
-- Compute units --
-- Shader 256
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory --
-- DirectX Version 11,1

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.

no iGPU GPU Qualcomm Adreno 530
No Codec h265 / HEVC (8 bit) Decode
No Codec h265 / HEVC (10 bit) No
No Codec h264 Decode
No Codec VP9 Decode
No Codec VP8 Decode
No Codec AV1 No
No Codec AVC No
No Codec VC-1 Decode
No Codec JPEG Decode

Memory & PCIe

The AMD Athlon II X4 635 can use up to 16 GB of memory in 2 memory channels. The maximum memory bandwidth is 21.3 GB/s. The Qualcomm Snapdragon 820 supports up to 12 GB of memory in 4 memory channels and achieves a memory bandwidth of up to 14.9 GB/s.

AMD Athlon II X4 635 Characteristic Qualcomm Snapdragon 820
DDR3-1333 Memory LPDDR4-3733
16 GB Max. Memory 12 GB
2 (Dual Channel) Memory channels 4 (Quad Channel)
21.3 GB/s Max. Bandwidth 14.9 GB/s
No ECC No
2.00 MB L2 Cache --
-- L3 Cache --
2.0 PCIe version --
-- PCIe lanes --
-- PCIe Bandwidth --

Thermal Management

The thermal design power (TDP for short) of the AMD Athlon II X4 635 is 95 W, while the Qualcomm Snapdragon 820 has a TDP of --. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently.

AMD Athlon II X4 635 Characteristic Qualcomm Snapdragon 820
95 W TDP (PL1 / PBP) --
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The AMD Athlon II X4 635 is manufactured in 45 nm and has 2.00 MB cache. The Qualcomm Snapdragon 820 is manufactured in 14 nm and has a 0.00 MB cache.

AMD Athlon II X4 635 Characteristic Qualcomm Snapdragon 820
45 nm Technology 14 nm
Unknown Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) Armv8-A (64 bit)
MMX, 3DNow!, SSE3, SSE4a ISA extensions --
AM3 Socket --
AMD-V Virtualization None
No AES-NI No
Windows 10, Linux Operating systems Android
Q1/2010 Release date Q4/2015
-- 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 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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
373 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
344 (92%)

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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
1288 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
903 (70%)

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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
2100 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
1362 (65%)

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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
376 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
0 (0%)

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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
1422 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
0 (0%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
367 (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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
0 (0%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
746 (100%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
147 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
0 (0%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
563 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 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.
AMD Athlon II X4 635 AMD Athlon II X4 635
@ 0.00 GHz
0 (0%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
Qualcomm Adreno 530 @ 0.62 GHz
476 (100%)

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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
68 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
0 (0%)

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.
AMD Athlon II X4 635 AMD Athlon II X4 635
4C 4T @ 2.90 GHz
265 (100%)
Qualcomm Snapdragon 820 Qualcomm Snapdragon 820
4C 4T @ 2.15 GHz
0 (0%)

Devices using this processor

AMD Athlon II X4 635 Qualcomm Snapdragon 820
Unknown Unknown

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