AMD Phenom II X4 840 vs Intel Atom Z3775

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CPU comparison with benchmarks


AMD Phenom II X4 840 CPU1 vs CPU2 Intel Atom Z3775
AMD Phenom II X4 840 Intel Atom Z3775

CPU comparison

In this CPU comparison, we compare the AMD Phenom II X4 840 and the Intel Atom Z3775 and use benchmarks to check which processor is faster.

We compare the AMD Phenom II X4 840 4 core processor released in Q1/2011 with the Intel Atom Z3775 which has 4 CPU cores and was introduced in Q1/2014.
AMD Phenom II (52) Family Intel Atom (101)
AMD Phenom II - 840/850 (2) CPU group Intel Atom Z3700 (16)
5 Generation 4
Propus Architecture Bay Trail
Desktop / Server Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The AMD Phenom II X4 840 is a 4 core processor with a clock frequency of 3.20 GHz. The processor can compute 4 threads at the same time. The Intel Atom Z3775 clocks with 1.46 GHz (2.39 GHz), has 4 CPU cores and can calculate 4 threads in parallel.

AMD Phenom II X4 840 Characteristic Intel Atom Z3775
4 Cores 4
4 Threads 4
normal Core architecture normal
No Hyperthreading No
Yes Overclocking ? No
3.20 GHz Frequency 1.46 GHz
-- Turbo Frequency (1 Core) 2.39 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.

AMD Phenom II X4 840 Characteristic Intel Atom Z3775
-- 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.

no iGPU GPU Intel HD Graphics (Bay Trail GT1)
GPU frequency 0.31 GHz
-- GPU (Turbo) 0.78 GHz
-- GPU Generation 7
Technology 22 nm
Max. displays 2
-- Compute units 4
-- Shader 32
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory 2 GB
-- DirectX Version 11.2

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 Intel HD Graphics (Bay Trail GT1)
No Codec h265 / HEVC (8 bit) No
No Codec h265 / HEVC (10 bit) No
No Codec h264 Decode / Encode
No Codec VP9 No
No Codec VP8 No
No Codec AV1 No
No Codec AVC Decode / Encode
No Codec VC-1 Decode
No Codec JPEG Decode

Memory & PCIe

Up to GB of memory in a maximum of 2 memory channels is supported by the AMD Phenom II X4 840, while the Intel Atom Z3775 supports a maximum of 4 GB of memory with a maximum memory bandwidth of 17.1 GB/s enabled.

AMD Phenom II X4 840 Characteristic Intel Atom Z3775
DDR3-1333, DDR2-1066 Memory LPDDR3-1066
Max. Memory 4 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
21.3 GB/s Max. Bandwidth 17.1 GB/s
No ECC No
-- L2 Cache --
2.00 MB L3 Cache 2.00 MB
-- PCIe version --
-- PCIe lanes --
-- PCIe Bandwidth --

Thermal Management

The AMD Phenom II X4 840 has a TDP of 95 W. The TDP of the Intel Atom Z3775 is 3.5 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

AMD Phenom II X4 840 Characteristic Intel Atom Z3775
95 W TDP (PL1 / PBP) 3.5 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. 90 °C

Technical details

The AMD Phenom II X4 840 has 2.00 MB cache and is manufactured in 45 nm. The cache of Intel Atom Z3775 is at 2.00 MB. The processor is manufactured in 22 nm.

AMD Phenom II X4 840 Characteristic Intel Atom Z3775
45 nm Technology 22 nm
Unknown Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE3, SSE4a ISA extensions SSE4.1, SSE4.2
AM3 Socket BGA 1380
AMD-V Virtualization VT-x, VT-x EPT
No AES-NI Yes
Windows 10, Linux Operating systems
Q1/2011 Release date Q1/2014
-- Release price --
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Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
⌀ Multi core performance in 2 CPU benchmarks

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 Phenom II X4 840 AMD Phenom II X4 840
4C 4T @ 3.20 GHz
412 (100%)
Intel Atom Z3775 Intel Atom Z3775
4C 4T @ 2.39 GHz
235 (57%)

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 Phenom II X4 840 AMD Phenom II X4 840
4C 4T @ 3.20 GHz
1473 (100%)
Intel Atom Z3775 Intel Atom Z3775
4C 4T @ 1.46 GHz
803 (55%)

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 Phenom II X4 840 AMD Phenom II X4 840
4C 4T @ 3.20 GHz
2352 (100%)
Intel Atom Z3775 Intel Atom Z3775
4C 4T @ 1.46 GHz
703 (30%)

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.
AMD Phenom II X4 840 AMD Phenom II X4 840
@ 0.00 GHz
0 (0%)
Intel Atom Z3775 Intel Atom Z3775
Intel HD Graphics (Bay Trail GT1) @ 0.78 GHz
50 (100%)

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.
AMD Phenom II X4 840 AMD Phenom II X4 840
4C 4T @ 3.20 GHz
84 (100%)
Intel Atom Z3775 Intel Atom Z3775
4C 4T @ 2.39 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.
AMD Phenom II X4 840 AMD Phenom II X4 840
4C 4T @ 3.20 GHz
324 (100%)
Intel Atom Z3775 Intel Atom Z3775
4C 4T @ 1.46 GHz
0 (0%)

Devices using this processor

AMD Phenom II X4 840 Intel Atom Z3775
Unknown Unknown

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