Intel Core i5-8257U vs AMD Athlon II X3 400e

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CPU comparison with benchmarks


Intel Core i5-8257U CPU1 vs CPU2 AMD Athlon II X3 400e
Intel Core i5-8257U AMD Athlon II X3 400e

CPU comparison

In this CPU comparison, we compare the Intel Core i5-8257U and the AMD Athlon II X3 400e and use benchmarks to check which processor is faster.

We compare the Intel Core i5-8257U 4 core processor released in Q3/2019 with the AMD Athlon II X3 400e which has 3 CPU cores and was introduced in Q3/2009.
Intel Core i5 (331) Family AMD Athlon II (52)
Intel Core i 8000U (8) CPU group AMD Athlon II X3 (Rana) (12)
8 Generation 1
Coffee Lake U Architecture Rana
Mobile Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i5-8257U is a 4 core processor with a clock frequency of 1.40 GHz (3.90 GHz). The processor can compute 8 threads at the same time. The AMD Athlon II X3 400e clocks with 2.20 GHz, has 3 CPU cores and can calculate 3 threads in parallel.

Intel Core i5-8257U Characteristic AMD Athlon II X3 400e
4 Cores 3
8 Threads 3
normal Core architecture normal
Yes Hyperthreading No
No Overclocking ? No
1.40 GHz Frequency 2.20 GHz
3.90 GHz Turbo Frequency (1 Core) --
3.20 GHz Turbo Frequency (All Cores) --

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 i5-8257U Characteristic AMD Athlon II X3 400e
-- 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 Iris Plus Graphics 645 GPU no iGPU
0.30 GHz GPU frequency --
1.05 GHz GPU (Turbo) --
9.5 GPU Generation --
14 nm Technology
3 Max. displays
48 Compute units --
384 Shader --
No Hardware Raytracing No
No Frame Generation No
32 GB Max. GPU Memory --
12 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 Iris Plus Graphics 645 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
Decode / Encode Codec AVC No
Decode Codec VC-1 No
Decode / Encode Codec JPEG No

Memory & PCIe

Up to 32 GB of memory in a maximum of 2 memory channels is supported by the Intel Core i5-8257U, while the AMD Athlon II X3 400e supports a maximum of 16 GB of memory with a maximum memory bandwidth of 21.3 GB/s enabled.

Intel Core i5-8257U Characteristic AMD Athlon II X3 400e
DDR4-2400 Memory DDR3-1333
32 GB Max. Memory 16 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
38.4 GB/s Max. Bandwidth 21.3 GB/s
No ECC No
-- L2 Cache 1.50 MB
6.00 MB L3 Cache --
3.0 PCIe version 2.0
16 PCIe lanes --
15.8 GB/s PCIe Bandwidth --

Thermal Management

The Intel Core i5-8257U has a TDP of 15 W. The TDP of the AMD Athlon II X3 400e is 45 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core i5-8257U Characteristic AMD Athlon II X3 400e
15 W TDP (PL1 / PBP) 45 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core i5-8257U has 6.00 MB cache and is manufactured in 14 nm. The cache of AMD Athlon II X3 400e is at 1.50 MB. The processor is manufactured in 45 nm.

Intel Core i5-8257U Characteristic AMD Athlon II X3 400e
14 nm Technology 45 nm
Monolithic Chip design Unknown
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2 ISA extensions MMX, 3DNow!, SSE3, SSE4a
BGA 1528 Socket AM3
VT-x, VT-x EPT, VT-d Virtualization AMD-V
Yes AES-NI No
Windows 10, Windows 11, Linux Operating systems Windows 10, Linux
Q3/2019 Release date Q3/2009
320 $ Release price --
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Rate these processors

Here you can rate the Intel Core i5-8257U to help other visitors make their purchasing decisions. The average rating is 4.0 stars (3 ratings). Rate now:
Here you can rate the AMD Athlon II X3 400e 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 1 CPU benchmarks
Intel Core i5-8257U (100%)
AMD Athlon II X3 400e (28%)
⌀ Multi core performance in 2 CPU benchmarks
Intel Core i5-8257U (100%)
AMD Athlon II X3 400e (19%)

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 i5-8257U Intel Core i5-8257U
4C 8T @ 3.90 GHz
989 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 GHz
280 (28%)

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 i5-8257U Intel Core i5-8257U
4C 8T @ 3.20 GHz
3770 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 GHz
765 (20%)

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 i5-8257U Intel Core i5-8257U
4C 8T @ 3.20 GHz
7628 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 GHz
1317 (17%)

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.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.90 GHz
998 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 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.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.20 GHz
4017 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 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.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.90 GHz
1212 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 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 Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.20 GHz
4237 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 GHz
0 (0%)

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.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.90 GHz
391 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 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.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.20 GHz
1589 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 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 i5-8257U Intel Core i5-8257U
Intel Iris Plus Graphics 645 @ 1.05 GHz
806 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
@ 0.00 GHz
0 (0%)

Blender 3.1 Benchmark

In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.20 GHz
66 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 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.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.90 GHz
159 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 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.
Intel Core i5-8257U Intel Core i5-8257U
4C 8T @ 3.20 GHz
667 (100%)
AMD Athlon II X3 400e AMD Athlon II X3 400e
3C 3T @ 2.20 GHz
0 (0%)

Devices using this processor

Intel Core i5-8257U AMD Athlon II X3 400e
Apple MacBook Pro 13 (2019) Unknown

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