AMD Athlon II X4 645 vs Intel Atom C3858

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CPU comparison with benchmarks


AMD Athlon II X4 645 CPU1 vs CPU2 Intel Atom C3858
AMD Athlon II X4 645 Intel Atom C3858

CPU comparison

AMD Athlon II X4 645 or Intel Atom C3858 - 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 645 has 4 cores with 4 threads and clocks with a maximum frequency of 3.10 GHz. Up to 16 GB of memory is supported in 2 memory channels. The AMD Athlon II X4 645 was released in Q3/2010.

The Intel Atom C3858 has 12 cores with 12 threads and clocks with a maximum frequency of 2.00 GHz. The CPU supports up to 256 GB of memory in 2 memory channels. The Intel Atom C3858 was released in Q3/2017.
AMD Athlon II (52) Family Intel Atom (108)
AMD Athlon II X4 (Propus) (10) CPU group Intel Atom C3000 (20)
1 Generation 5
Propus Architecture Denverton
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Athlon II X4 645 is a 4 core processor with a clock frequency of 3.10 GHz. The Intel Atom C3858 has 12 CPU cores with a clock frequency of 2.00 GHz.

AMD Athlon II X4 645 Characteristic Intel Atom C3858
4 Cores 12
4 Threads 12
normal Core architecture normal
No Hyperthreading No
No Overclocking ? No
3.10 GHz Frequency 2.00 GHz
-- Turbo Frequency (1 Core) --
-- 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.

AMD Athlon II X4 645 Characteristic Intel Atom C3858
-- 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.

no iGPU GPU no iGPU
GPU frequency --
-- GPU (Turbo) --
-- GPU Generation --
Technology
Max. displays
-- Compute units --
-- Shader --
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory --
-- 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.

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

Memory & PCIe

The AMD Athlon II X4 645 supports a maximum of 16 GB of memory in 2 memory channels. The Intel Atom C3858 can connect up to 256 GB of memory in 2 memory channels.

AMD Athlon II X4 645 Characteristic Intel Atom C3858
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
2.00 MB L2 Cache 12.00 MB
-- L3 Cache --
2.0 PCIe version 3.0
-- PCIe lanes 16
-- PCIe Bandwidth 15.8 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The AMD Athlon II X4 645 has a TDP of 95 W, that of the Intel Atom C3858 is 25 W.

AMD Athlon II X4 645 Characteristic Intel Atom C3858
95 W TDP (PL1 / PBP) 25 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. 100 °C

Technical details

The AMD Athlon II X4 645 has a 2.00 MB cache, while the Intel Atom C3858 cache has a total of 12.00 MB.

AMD Athlon II X4 645 Characteristic Intel Atom C3858
45 nm Technology 14 nm
Unknown Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
MMX, 3DNow!, SSE3, SSE4a ISA extensions SSE4.1, SSE4.2
AM3 Socket BGA 1310
AMD-V Virtualization VT-x, VT-x EPT, VT-d
No AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Linux
Q3/2010 Release date Q3/2017
-- Release price 332 $
show more data show more data


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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 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
402 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 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 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
1520 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 GHz
0 (0%)

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 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
399 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 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.
AMD Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
1374 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 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.
AMD Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
157 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 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 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
601 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 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.
AMD Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
2274 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 GHz
0 (0%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
AMD Athlon II X4 645 AMD Athlon II X4 645
4C 4T @ 3.10 GHz
575 (100%)
Intel Atom C3858 Intel Atom C3858
12C 12T @ 2.00 GHz
0 (0%)

Devices using this processor

AMD Athlon II X4 645 Intel Atom C3858
Unknown Unknown

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