Intel Core i5-8400T vs Intel Atom E3845

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CPU comparison with benchmarks


Intel Core i5-8400T CPU1 vs CPU2 Intel Atom E3845
Intel Core i5-8400T Intel Atom E3845

CPU comparison

Intel Core i5-8400T or Intel Atom E3845 - 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 Core i5-8400T has 6 cores with 6 threads and clocks with a maximum frequency of 3.30 GHz. Up to 128 GB of memory is supported in 2 memory channels. The Intel Core i5-8400T was released in Q2/2018.

The Intel Atom E3845 has 4 cores with 4 threads and clocks with a maximum frequency of 1.91 GHz. The CPU supports up to 8 GB of memory in 2 memory channels. The Intel Atom E3845 was released in Q4/2013.
Intel Core i5 (328) Family Intel Atom (101)
Intel Core i 8000 (20) CPU group Intel Atom E3800 (6)
8 Generation 4
Coffee Lake S Architecture Bay Trail
Desktop / Server Segment Mobile
Intel Core i5-7400T Predecessor --
Intel Core i5-9400T Successor --

CPU Cores and Base Frequency

The Intel Core i5-8400T has 6 CPU cores and can calculate 6 threads in parallel. The clock frequency of the Intel Core i5-8400T is 1.70 GHz (3.30 GHz) while the Intel Atom E3845 has 4 CPU cores and 4 threads can calculate simultaneously. The clock frequency of the Intel Atom E3845 is at 1.91 GHz.

Intel Core i5-8400T Characteristic Intel Atom E3845
6 Cores 4
6 Threads 4
normal Core architecture normal
No Hyperthreading No
Yes Overclocking ? No
1.70 GHz Frequency 1.91 GHz
3.30 GHz Turbo Frequency (1 Core) --
2.80 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 i5-8400T Characteristic Intel Atom E3845
-- AI hardware --
-- AI specifications --

Internal Graphics

The Intel Core i5-8400T or Intel Atom E3845 has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die.

Intel UHD Graphics 630 GPU Intel HD Graphics (Bay Trail GT1)
0.35 GHz GPU frequency 0.54 GHz
1.15 GHz GPU (Turbo) 0.79 GHz
9.5 GPU Generation 7
14 nm Technology 22 nm
3 Max. displays 2
24 Compute units 4
192 Shader 32
No Hardware Raytracing No
No Frame Generation No
64 GB Max. GPU Memory 2 GB
12 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.

Intel UHD Graphics 630 GPU Intel HD Graphics (Bay Trail 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
No Codec AV1 No
Decode / Encode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode

Memory & PCIe

The Intel Core i5-8400T can use up to 128 GB of memory in 2 memory channels. The maximum memory bandwidth is 42.7 GB/s. The Intel Atom E3845 supports up to 8 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 21.3 GB/s.

Intel Core i5-8400T Characteristic Intel Atom E3845
DDR4-2666 Memory DDR3L-1333
128 GB Max. Memory 8 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
42.7 GB/s Max. Bandwidth 21.3 GB/s
No ECC No
-- L2 Cache --
9.00 MB L3 Cache 2.00 MB
3.0 PCIe version --
16 PCIe lanes --
15.8 GB/s PCIe Bandwidth --

Thermal Management

The thermal design power (TDP for short) of the Intel Core i5-8400T is 95 W, while the Intel Atom E3845 has a TDP of 10 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently.

Intel Core i5-8400T Characteristic Intel Atom E3845
95 W TDP (PL1 / PBP) 10 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core i5-8400T is manufactured in 14 nm and has 9.00 MB cache. The Intel Atom E3845 is manufactured in 22 nm and has a 2.00 MB cache.

Intel Core i5-8400T Characteristic Intel Atom E3845
14 nm Technology 22 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2 ISA extensions SSE4.1, SSE4.2
LGA 1151-2 Socket BGA 1170
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems
Q2/2018 Release date Q4/2013
260 $ Release price --
show more data show more data


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Average performance in benchmarks

⌀ Single core performance in 2 CPU benchmarks
⌀ Multi core performance in 3 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.
Intel Core i5-8400T Intel Core i5-8400T
6C 6T @ 3.30 GHz
858 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 GHz
198 (23%)

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 i5-8400T Intel Core i5-8400T
6C 6T @ 2.80 GHz
3607 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 GHz
696 (19%)

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 i5-8400T Intel Core i5-8400T
6C 6T @ 3.30 GHz
1092 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 GHz
151 (14%)

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 i5-8400T Intel Core i5-8400T
6C 6T @ 2.80 GHz
3816 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 GHz
455 (12%)

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 i5-8400T Intel Core i5-8400T
Intel UHD Graphics 630 @ 1.15 GHz
442 (100%)
Intel Atom E3845 Intel Atom E3845
Intel HD Graphics (Bay Trail GT1) @ 0.79 GHz
51 (11%)

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 i5-8400T Intel Core i5-8400T
6C 6T @ 2.80 GHz
7503 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 GHz
1058 (14%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i5-8400T Intel Core i5-8400T
6C 6T @ 3.30 GHz
49 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 GHz
0 (0%)

Cinebench 2024 (Multi-Core)

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i5-8400T Intel Core i5-8400T
6C 6T @ 3.30 GHz
272 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 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.
Intel Core i5-8400T Intel Core i5-8400T
6C 6T @ 1.70 GHz
1963 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 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 i5-8400T Intel Core i5-8400T
6C 6T @ 3.30 GHz
139 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 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 i5-8400T Intel Core i5-8400T
6C 6T @ 2.80 GHz
696 (100%)
Intel Atom E3845 Intel Atom E3845
4C 4T @ 1.91 GHz
0 (0%)

Devices using this processor

Intel Core i5-8400T Intel Atom E3845
Unknown Unknown

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