Intel Core i5-655K vs Intel Atom C3950

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CPU comparison with benchmarks


Intel Core i5-655K CPU1 vs CPU2 Intel Atom C3950
Intel Core i5-655K Intel Atom C3950

CPU comparison

In this CPU comparison, we compare the Intel Core i5-655K and the Intel Atom C3950 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 Intel Atom C3950 which has 16 CPU cores and was introduced in Q3/2017.
Intel Core i5 (331) Family Intel Atom (108)
Intel Core i5 600 (6) CPU group Intel Atom C3000 (20)
1 Generation 5
Clarkdale Architecture Denverton
Desktop / Server Segment Desktop / Server
-- 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 Intel Atom C3950 clocks with 1.70 GHz (2.20 GHz), has 16 CPU cores and can calculate 16 threads in parallel.

Intel Core i5-655K Characteristic Intel Atom C3950
2 Cores 16
4 Threads 16
normal Core architecture normal
Yes Hyperthreading No
Yes Overclocking ? No
3.20 GHz Frequency 1.70 GHz
3.46 GHz Turbo Frequency (1 Core) 2.20 GHz
-- Turbo Frequency (All Cores) 2.20 GHz

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 Intel Atom C3950
-- AI hardware --
-- AI specifications --

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 no iGPU
0.50 GHz GPU frequency --
0.73 GHz GPU (Turbo) --
5 GPU Generation --
32 nm Technology
2 Max. displays
12 Compute units --
24 Shader --
No Hardware Raytracing No
No Frame Generation No
2 GB Max. GPU Memory --
10.1 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.

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

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 Intel Atom C3950 supports a maximum of 256 GB of memory with a maximum memory bandwidth of 38.4 GB/s enabled.

Intel Core i5-655K Characteristic Intel Atom C3950
DDR3-1066, DDR3-1333 Memory DDR4-2400
16 GB Max. Memory 256 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
21.3 GB/s Max. Bandwidth 38.4 GB/s
No ECC Yes
0.50 MB L2 Cache 16.00 MB
4.00 MB L3 Cache --
2.0 PCIe version 3.0
16 PCIe lanes 16
8.0 GB/s PCIe Bandwidth 15.8 GB/s

Thermal Management

The Intel Core i5-655K has a TDP of 73 W. The TDP of the Intel Atom C3950 is 24 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core i5-655K Characteristic Intel Atom C3950
73 W TDP (PL1 / PBP) 24 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. 100 °C

Technical details

The Intel Core i5-655K has 4.50 MB cache and is manufactured in 32 nm. The cache of Intel Atom C3950 is at 16.00 MB. The processor is manufactured in 14 nm.

Intel Core i5-655K Characteristic Intel Atom C3950
32 nm Technology 14 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2 ISA extensions SSE4.1, SSE4.2
LGA 1156 Socket BGA 1310
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Linux
Q1/2010 Release date Q3/2017
177 $ Release price 389 $
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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%)
Intel Atom C3950 Intel Atom C3950
16C 16T @ 2.20 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.
Intel Core i5-655K Intel Core i5-655K
2C 4T @ 3.20 GHz
1252 (100%)
Intel Atom C3950 Intel Atom C3950
16C 16T @ 2.20 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.
Intel Core i5-655K Intel Core i5-655K
Intel HD Graphics (Westmere) @ 0.73 GHz
35 (100%)
Intel Atom C3950 Intel Atom C3950
@ 0.00 GHz
0 (0%)

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%)
Intel Atom C3950 Intel Atom C3950
16C 16T @ 2.20 GHz
0 (0%)

Devices using this processor

Intel Core i5-655K Intel Atom C3950
Unknown Unknown

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