Intel Atom x6425E vs Intel Pentium 3556U

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CPU comparison with benchmarks


Intel Atom x6425E CPU1 vs CPU2 Intel Pentium 3556U
Intel Atom x6425E Intel Pentium 3556U

CPU comparison

Intel Atom x6425E or Intel Pentium 3556U - 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 Intel Atom x6425E has 4 cores with 4 threads and clocks with a maximum frequency of 3.00 GHz. Up to 32 GB of memory is supported in 4 memory channels. The Intel Atom x6425E was released in Q1/2021.

The Intel Pentium 3556U has 2 cores with 2 threads and clocks with a maximum frequency of 1.70 GHz. The CPU supports up to 16 GB of memory in 2 memory channels. The Intel Pentium 3556U was released in Q3/2013.
Intel Atom (108) Family Intel Pentium (150)
Intel Atom x6000 (10) CPU group Intel Pentium 3000 (8)
6 Generation 4
Elkhart Lake Architecture Haswell U
Mobile Segment Mobile
-- Predecessor --
Intel Atom x7425E Successor --

CPU Cores and Base Frequency

The Intel Atom x6425E is a 4 core processor with a clock frequency of 2.00 GHz (3.00 GHz). The Intel Pentium 3556U has 2 CPU cores with a clock frequency of 1.70 GHz.
Intel Atom x6425E Characteristic Intel Pentium 3556U
4 Cores 2
4 Threads 2
normal Core architecture normal
No Hyperthreading No
No Overclocking ? No
2.00 GHz Frequency 1.70 GHz
3.00 GHz Turbo Frequency (1 Core) --
2.70 GHz Turbo Frequency (All Cores) --

NPU AI performance

The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.
Intel Atom x6425E Characteristic Intel Pentium 3556U
-- AI hardware --
-- AI specifications --
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

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.
Intel UHD Graphics 10th Gen (32 EU) GPU Intel HD Graphics (Haswell GT1)
0.50 GHz GPU frequency 0.20 GHz
0.75 GHz GPU (Turbo) 1.00 GHz
11 GPU Generation 7.5
14 nm Technology 22 nm
3 Max. displays 3
32 Compute units 10
256 Shader 80
No Hardware Raytracing No
No Frame Generation No
64 GB Max. GPU Memory 2 GB
12 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 UHD Graphics 10th Gen (32 EU) GPU Intel HD Graphics (Haswell GT1)
Decode / Encode Codec h265 / HEVC (8 bit) No
Decode / Encode Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 Decode / Encode
Decode / Encode Codec VP9 No
Decode / Encode Codec VP8 No
Decode Codec AV1 No
Decode / Encode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode

Memory & PCIe

The Intel Atom x6425E supports a maximum of 32 GB of memory in 4 memory channels. The Intel Pentium 3556U can connect up to 16 GB of memory in 2 memory channels.
Intel Atom x6425E Characteristic Intel Pentium 3556U
LPDDR4X-3733, DDR4-3200 Memory LPDDR3-1333, LPDDR3-1600, DDR3L-1333, DDR3L-1600
32 GB Max. Memory 16 GB
4 (Quad Channel) Memory channels 2 (Dual Channel)
119.2 GB/s Max. Bandwidth 25.6 GB/s
Yes ECC No
1.50 MB L2 Cache --
-- L3 Cache 2.00 MB
3.0 PCIe version 2.0
8 PCIe lanes 10
7.9 GB/s PCIe Bandwidth 5.0 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Atom x6425E has a TDP of 12 W, that of the Intel Pentium 3556U is 15 W.
Intel Atom x6425E Characteristic Intel Pentium 3556U
12 W TDP (PL1 / PBP) 15 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
105 °C Tjunction max. 100 °C

Technical details

The Intel Atom x6425E has a 1.50 MB cache, while the Intel Pentium 3556U cache has a total of 2.00 MB.
Intel Atom x6425E Characteristic Intel Pentium 3556U
10 nm Technology 22 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
BGA 1493 Socket BGA 1168
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Operating systems Windows 10, Linux
Q1/2021 Release date Q3/2013
56 $ Release price --
show more data show more data


Rate these processors

Here you can rate the Intel Atom x6425E to help other visitors make their purchasing decisions. The average rating is 1.0 stars (1 ratings). Rate now:
Here you can rate the Intel Pentium 3556U to help other visitors make their purchasing decisions. The average rating is 5.0 stars (1 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 2 CPU benchmarks
Intel Atom x6425E (100%)
Intel Pentium 3556U (59%)
⌀ Multi core performance in 3 CPU benchmarks
Intel Atom x6425E (100%)
Intel Pentium 3556U (34%)

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 Atom x6425E Intel Atom x6425E
4C 4T @ 3.00 GHz
676 (100%)
Intel Pentium 3556U Intel Pentium 3556U
2C 2T @ 1.70 GHz
408 (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 Atom x6425E Intel Atom x6425E
4C 4T @ 2.70 GHz
2055 (100%)
Intel Pentium 3556U Intel Pentium 3556U
2C 2T @ 1.70 GHz
772 (38%)

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 Atom x6425E Intel Atom x6425E
Intel UHD Graphics 10th Gen (32 EU) @ 0.75 GHz
400 (100%)
Intel Pentium 3556U Intel Pentium 3556U
Intel HD Graphics (Haswell GT1) @ 1.00 GHz
160 (40%)

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 Atom x6425E Intel Atom x6425E
4C 4T @ 2.70 GHz
3885 (100%)
Intel Pentium 3556U Intel Pentium 3556U
2C 2T @ 1.70 GHz
1040 (27%)

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.
Intel Atom x6425E Intel Atom x6425E
4C 4T @ 3.00 GHz
114 (100%)
Intel Pentium 3556U Intel Pentium 3556U
2C 2T @ 1.70 GHz
66 (58%)

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.
Intel Atom x6425E Intel Atom x6425E
4C 4T @ 2.70 GHz
335 (100%)
Intel Pentium 3556U Intel Pentium 3556U
2C 2T @ 1.70 GHz
126 (38%)

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 Atom x6425E Intel Atom x6425E
4C 4T @ 3.00 GHz
539 (100%)
Intel Pentium 3556U Intel Pentium 3556U
2C 2T @ 1.70 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.
Intel Atom x6425E Intel Atom x6425E
4C 4T @ 2.70 GHz
1434 (100%)
Intel Pentium 3556U Intel Pentium 3556U
2C 2T @ 1.70 GHz
0 (0%)

Devices using this processor
Intel Atom x6425E Intel Pentium 3556U
Unknown Unknown

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