Intel Core i5-655K vs Qualcomm Snapdragon 821

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CPU comparison with benchmarks


Intel Core i5-655K CPU1 vs CPU2 Qualcomm Snapdragon 821
Intel Core i5-655K Qualcomm Snapdragon 821

CPU comparison

In this CPU comparison, we compare the Intel Core i5-655K and the Qualcomm Snapdragon 821 and use benchmarks to check which processor is faster.

We compare the Intel Core i5-655K 2 core processor released in Q1/2010 with the Qualcomm Snapdragon 821 which has 4 CPU cores and was introduced in Q3/2016.
Intel Core i5 (331) Family Qualcomm Snapdragon (102)
Intel Core i5 600 (6) CPU group Qualcomm Snapdragon 820 (3)
1 Generation 3
Clarkdale Architecture Kryo
Desktop / Server Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i5-655K is a 2 core processor with a clock frequency of 3.20 GHz (3.46 GHz). The processor can compute 4 threads at the same time. The Qualcomm Snapdragon 821 clocks with 2.40 GHz, has 4 CPU cores and can calculate 4 threads in parallel.

Intel Core i5-655K Characteristic Qualcomm Snapdragon 821
2 Cores 4
4 Threads 4
normal Core architecture hybrid (big.LITTLE)
Yes Hyperthreading No
Yes Overclocking ? No
3.20 GHz (3.46 GHz) A-Core 2.40 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.

Intel Core i5-655K Characteristic Qualcomm Snapdragon 821
-- AI hardware Qualcomm AI engine
-- AI specifications Hexagon 680

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.

Intel HD Graphics (Westmere) GPU Qualcomm Adreno 530
0.50 GHz GPU frequency 0.62 GHz
0.73 GHz GPU (Turbo) 0.62 GHz
5 GPU Generation 5
32 nm Technology 14 nm
2 Max. displays 0
12 Compute units --
24 Shader 256
No Hardware Raytracing No
No Frame Generation No
2 GB Max. GPU Memory --
10.1 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.

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

Memory & PCIe

Up to 16 GB of memory in a maximum of 2 memory channels is supported by the Intel Core i5-655K, while the Qualcomm Snapdragon 821 supports a maximum of 8 GB of memory with a maximum memory bandwidth of 14.9 GB/s enabled.

Intel Core i5-655K Characteristic Qualcomm Snapdragon 821
DDR3-1066, DDR3-1333 Memory LPDDR4-3733
16 GB Max. Memory 8 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
21.3 GB/s Max. Bandwidth 14.9 GB/s
No ECC No
0.50 MB L2 Cache --
4.00 MB L3 Cache --
2.0 PCIe version --
16 PCIe lanes --
8.0 GB/s PCIe Bandwidth --

Thermal Management

The Intel Core i5-655K has a TDP of 73 W. The TDP of the Qualcomm Snapdragon 821 is --. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core i5-655K Characteristic Qualcomm Snapdragon 821
73 W TDP (PL1 / PBP) --
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core i5-655K has 4.50 MB cache and is manufactured in 32 nm. The cache of Qualcomm Snapdragon 821 is at 0.00 MB. The processor is manufactured in 14 nm.

Intel Core i5-655K Characteristic Qualcomm Snapdragon 821
32 nm Technology 14 nm
Monolithic Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) Armv8-A (64 bit)
SSE4.1, SSE4.2 ISA extensions --
LGA 1156 Socket --
VT-x, VT-x EPT, VT-d Virtualization None
Yes AES-NI No
Windows 10, Linux Operating systems Android
Q1/2010 Release date Q3/2016
177 $ Release price --
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Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
Intel Core i5-655K (100%)
Qualcomm Snapdragon 821 (60%)
⌀ Multi core performance in 2 CPU benchmarks
Intel Core i5-655K (100%)
Qualcomm Snapdragon 821 (71%)

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.
Intel Core i5-655K Intel Core i5-655K
2C 4T @ 3.46 GHz
564 (100%)
Qualcomm Snapdragon 821 Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz
341 (60%)

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.
Intel Core i5-655K Intel Core i5-655K
2C 4T @ 3.20 GHz
1252 (100%)
Qualcomm Snapdragon 821 Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz
864 (69%)

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.
Intel Core i5-655K Intel Core i5-655K
Intel HD Graphics (Westmere) @ 0.73 GHz
35 (7%)
Qualcomm Snapdragon 821 Qualcomm Snapdragon 821
Qualcomm Adreno 530 @ 0.62 GHz
476 (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.
Intel Core i5-655K Intel Core i5-655K
2C 4T @ 3.20 GHz
2221 (100%)
Qualcomm Snapdragon 821 Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz
1594 (72%)

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.
Intel Core i5-655K Intel Core i5-655K
2C 4T @ 3.46 GHz
0 (0%)
Qualcomm Snapdragon 821 Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz
370 (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.
Intel Core i5-655K Intel Core i5-655K
2C 4T @ 3.20 GHz
0 (0%)
Qualcomm Snapdragon 821 Qualcomm Snapdragon 821
4C 4T @ 2.40 GHz
752 (100%)

Devices using this processor

Intel Core i5-655K Qualcomm Snapdragon 821
Unknown Unknown

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