Core i5-8400H

Details and Benchmarks for Intel Core i5-8400H

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Please take all results with a big grain of salt. Sysbuilds is in alpha stage at the moment which can lead to wrong data, strange counting errors, silly results and more. This site is under active development.

Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Core i5-8400H based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

5,433 Rank: 531
Rank Name Score Visual
527 Xeon E5-2673 v4 5,436
+0.1%
528 Xeon E5-4627 v4 5,435
+0%
529 Pentium Gold G4600 5,434
+0%
530 Core i7-1185GRE 5,434
+0%
531 Core i5-8400H 5,433
532 Core i7-1185G7E 5,433
+0%
533 Core i5-7600 5,431
+-0%
534 Xeon E5-2618L v4 5,426
-0.1%
535 Core i7-5775C 5,425
-0.1%
536 Xeon D-2187NT 5,424
-0.2%

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Multicore Score

Multicore performance score for Core i5-8400H based on multi-threaded benchmark results.

4,900 Rank: 723
Rank Name Score Visual
719 Ryzen 3 PRO 4450U 4,906
+0.1%
720 Core i3-8100 4,903
+0.1%
721 Core i3-6098P 4,903
+0.1%
722 Core i5-9400F 4,901
+0%
723 Core i5-8400H 4,900
724 Ryzen 3 3200G 4,899
+-0%
725 Core i7-4960HQ 4,899
+-0%
726 Core i7-7920HQ 4,898
+-0%
727 Core i5-10210U 4,898
+-0%
728 Xeon E3-1275 v3 4,898
+-0%

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Singlecore Score

Single-core performance score for Core i5-8400H based on single-threaded benchmark results.

5,789 Rank: 364
Rank Name Score Visual
360 Xeon W-2195 5,794
+0.1%
361 Core i7-8706G 5,793
+0.1%
362 Ryzen 7 7730U 5,792
+0.1%
363 Ryzen 5 3500X 5,790
+0%
364 Core i5-8400H 5,789
365 AMD Ryzen 5 1500X 5,787
+-0%
366 Core i3-10300 5,784
-0.1%
367 Xeon W-2155 5,783
-0.1%
368 Xeon W-2191B 5,780
-0.2%
369 Core i7-4790K 5,780
-0.2%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Core i5-8400H based on integer math, floating point math, and prime number computation benchmarks.

4,698 Rank: 676
Rank Name Score Visual
672 Core i5-8400T 4,700
+0%
673 Core i3-8350K 4,699
+0%
674 Core i7-4790 4,699
+0%
675 Ryzen 3 PRO 4450U 4,699
+0%
676 Core i5-8400H 4,698
677 Xeon E3-1270 v3 4,698
+0%
678 Ryzen 3 2300X 4,698
+0%
679 Ryzen 5 7520U 4,698
+0%
680 Xeon E3-1230 V5 4,696
+-0%
681 Xeon D-1528 4,696
+-0%

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Data Processing

Aggregated score for Core i5-8400H based on data encryption, data compression, and string sorting benchmarks.

4,685 Rank: 712
Rank Name Score Visual
708 Xeon E3-1290 v2 4,688
+0.1%
709 Xeon E5-1620 v4 4,687
+0%
710 Core i7-3770 4,687
+0%
711 Core i7-7820HK 4,686
+0%
712 Core i5-8400H 4,685
713 Xeon E3-1575M v5 4,685
+0%
714 Xeon E5-2637 v4 4,685
+0%
715 Core i7-8706G 4,685
+0%
716 Xeon E3-1245 V2 4,685
+0%
717 Xeon E3-1240 V2 4,685
+0%

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Physics & Compute

Aggregated score for Core i5-8400H based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,727 Rank: 689
Rank Name Score Visual
685 Xeon D-1531 4,729
+0%
686 Core i7-8709G 4,729
+0%
687 Core i7-6920HQ 4,728
+0%
688 Xeon E5-2450 v2 4,728
+0%
689 Core i5-8400H 4,727
690 Xeon E3-1505M v5 4,726
+-0%
691 Core i7-4770K 4,726
+-0%
692 Core i7-4790 4,726
+-0%
693 Xeon E3-1241 v3 4,726
+-0%
694 Xeon E3-1275 v3 4,725
+-0%

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Core i5-8400H Details

Ranking #531 of 2060 in overall performance, the Intel Core i5-8400H represents a capable mid-range mobile processor from Intel's Coffee Lake-H architecture. Launched in April 2018, this 14 nm chip is now over seven years old, placing it firmly in the older generation of mobile CPUs. Despite its age, it remains relevant in entry-level and mainstream laptops where integrated graphics and balanced power efficiency are priorities. With a base clock of 2.5 GHz and a turbo frequency of up to 4.2 GHz, the Core i5-8400H delivers solid single-threaded performance, particularly for productivity and light content creation tasks. Its 4-core, 8-thread design benefits from Hyper-Threading, enabling it to handle multitasking and modern workloads more effectively than older dual-core chips.

The processor is built on Intel's Coffee Lake microarchitecture and features a 45 W TDP, making it suitable for thin-and-light laptops while still offering performance that outpaces many mobile CPUs from the same era. It supports DDR4-2666 and LPDDR3-2133 memory across two channels, with a maximum capacity of 64 GB and a peak memory bandwidth of 39.74 GiB/s. The chip integrates Intel's UHD Graphics 630, which includes 24 execution units capable of reaching a burst frequency of 1.1 GHz and supporting up to three displays. While not ideal for gaming or GPU-intensive workloads, this integrated graphics solution suffices for everyday computing and light multimedia use.

Cache hierarchy includes 0.125 MiB of L1 cache per core, 1 MiB of L2 cache, and a shared 8 MiB L3 cache, ensuring efficient data access for both single and multi-threaded operations. The Core i5-8400H supports a wide range of advanced features, including Intel VT-x, VT-d, and Intel Speed Shift Technology, which enables faster transitions between power states. It also supports AES-NI, AVX, and AVX2, making it suitable for encryption, scientific computing, and multimedia encoding. However, it lacks AVX-512 and ECC memory support, limiting its appeal in high-end workstations.

In benchmark testing, the Core i5-8400H scores 5,433 overall, 5,789 in single-core, and 4,900 in multicore performance. Its single-core score ranks it #364 of 2060, indicating strong performance for tasks like web browsing and office applications. However, its multicore score places it at #723, showing that while it handles multi-threaded workloads well, it lags behind modern high-core-count processors. Compared to its immediate competitors, it outperforms CPUs like the Core i7-7920HQ and Ryzen 3 3200G but falls behind newer models such as the Core i5-10210U and Ryzen 3 PRO 4450U.

As of March 2026, the Core i5-8400H remains a viable option for budget-conscious users or those upgrading older systems. It is best suited for general productivity, light video editing, and casual gaming. While newer CPUs have surpassed it in both performance and efficiency, its longevity and broad compatibility ensure it continues to serve as a reliable, albeit dated, mobile processor.
Frequently Compared

AMD Ryzen 3 PRO 2200GE 1 view

AMD Ryzen Threadripper 3970X 1 view

AMD Ryzen 9 PRO 3900 1 view

AMD Ryzen 5 PRO 3500U 1 view

Intel Core i5-8400H

Main Specifications

Designer: Intel
Name: Core i5-8400H
Family: Core
Series: i5-8000
Model Number: i5-8400H
Cores: 4
Threads: 8
Base Frequency: 2500 MHz
Turbo Frequency (1 core): 4200 MHz
Turbo Frequency (2 cores): 4200 MHz
Turbo Frequency (3 cores): 4100 MHz
Turbo Frequency (4 cores): 4100 MHz
Clock Multiplier: 25x (locked)
Microarchitecture: Coffee Lake
Core Name: Coffee Lake H
Core Family: 6
Core Model: 158
Socket: BGA1440
Package: FCBGA-1440
Chipset: 300
Target Segment: Mobile
Max CPUs: 1
TDP: 45 W
Release Price: $250.00

Cache Specifications

L1 Cache: 256 KiB
L1 Instruction Cache: 128 KiB (8-way set associative)
L1 Data Cache: 128 KiB (8-way set associative)
L2 Cache: 1 MiB (4-way set associative)
L3 Cache: 8 MiB (16-way set associative)

Memory Specifications

Supported Memory Type: DDR4-2666 and LPDDR3-2133
Memory Channels: 2
Maximum Memory: 64 GB
Maximum Bandwidth: 39.74 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 3.0
PCIe Lanes: 16
PCIe Configuration: 1x16, 2x8, 1x8+2x4

Integrated Graphics

GPU: UHD Graphics 630
GPU Designer: Intel
GPU Max Frequency: 1100 MHz
Execution Units: 24

Physical Specifications

Process: 14 nm
Die Area: 126 mm²
Manufacturer: Intel
Technology: CMOS
Word Size: 64-bit
ISA: x86-64 (x86)

CPU Features

MMX EMMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 ABM BMI1 BMI2 FMA3 AES RdRand ADX CLMUL F16C x86-16 x86-32 x86-64 Real Protected SMM FPU NX HT TBT 2.0 EIST SST TXT vPro VT-x VT-d EPT MPX SGX Secure Key SMEP SIPP IPT AVX-512 AVX512F AVX512CD AVX512BW AVX512DQ AVX512VL TSX VMD Flex Memory NM KPT PTT MBE Ctrl Run Sure Node Ctrlr
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