Core i5-8400

Details and Benchmarks for Intel Core i5-8400

Sysbuilds Alpha Stage!

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

5,459 Rank: 513
Rank Name Score Visual
509 Xeon Gold 6126 5,464
+0.1%
510 Core i7-5930K 5,464
+0.1%
511 Core i5-8500B 5,462
+0.1%
512 Core i7-10870H 5,460
+0%
513 Core i5-8400 5,459
514 Ryzen 3 5400U 5,459
+0%
515 Xeon E3-1280 v5 5,455
-0.1%
516 Core i5-10400F 5,455
-0.1%
517 Core i7-5960X 5,453
-0.1%
518 Core i7-5950HQ 5,446
-0.2%

View full ranking →

Multicore Score

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

5,097 Rank: 568
Rank Name Score Visual
564 Core i7-8709G 5,107
+0.2%
565 Xeon E5-2667 v2 5,103
+0.1%
566 Xeon E5-1650 v2 5,099
+0%
567 Core i5-8500T 5,098
+0%
568 Core i5-8400 5,097
569 Xeon E3-1270 v6 5,096
+-0%
570 Core i5-8500 5,092
-0.1%
571 Core i5-1135G7 5,091
-0.1%
572 Xeon Gold 6244 5,086
-0.2%
573 Xeon E5-2623 v4 5,086
-0.2%

View full ranking →

Singlecore Score

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

5,701 Rank: 419
Rank Name Score Visual
415 Intel Core i7-4960HQ 5,703
+0%
416 Core i7-10850H 5,703
+0%
417 Xeon Gold 6346 5,702
+0%
418 Core i7-1065G7 5,701
+0%
419 Core i5-8400 5,701
420 Core i5-8279U 5,700
+-0%
421 Core i7-7567U 5,699
+-0%
422 Ryzen 5 4600G 5,697
-0.1%
423 Core i3-9300 5,696
-0.1%
424 Xeon Silver 4410Y 5,696
-0.1%

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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 i5-8400 based on integer math, floating point math, and prime number computation benchmarks.

4,760 Rank: 571
Rank Name Score Visual
567 Core i5-8500 4,764
+0.1%
568 Xeon E3-1285L v4 4,764
+0.1%
569 Core i5-10400T 4,763
+0.1%
570 Core i5-1145G7E 4,761
+0%
571 Core i5-8400 4,760
572 Core i7-5950HQ 4,760
+0%
573 Core i5-1135G7 4,760
+0%
574 Xeon E-2274G 4,756
-0.1%
575 Xeon Gold 5122 4,755
-0.1%
576 Core i3-10320 4,755
-0.1%

View full ranking →

Data Processing

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

4,749 Rank: 606
Rank Name Score Visual
602 Xeon E3-1286 v3 4,753
+0.1%
603 Core i7-10710U 4,751
+0%
604 Xeon W3690 4,751
+0%
605 Xeon E-2324G 4,751
+0%
606 Core i5-8400 4,749
607 Core i3-10100 4,749
+0%
608 Core i7-1185G7E 4,749
+0%
609 Xeon E3-1280 v6 4,748
+-0%
610 Core i7-6700K 4,748
+-0%
611 Xeon E3-1270 v6 4,747
+-0%

View full ranking →

Physics & Compute

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

4,872 Rank: 496
Rank Name Score Visual
492 Ryzen Threadripper 1900X 4,880
+0.2%
493 Xeon Silver 4110 4,879
+0.1%
494 Core Ultra 5 134U 4,875
+0.1%
495 Xeon D-1577 4,873
+0%
496 Core i5-8400 4,872
497 Core i7-5820K 4,872
+0%
498 Core i5-9400 4,871
+-0%
499 Ryzen 7 PRO 2700X 4,871
+-0%
500 Core i7-10850H 4,869
-0.1%
501 Xeon E5-2630L v4 4,868
-0.1%

View full ranking →

Core i5-8400 Details

As of March 2026, the Intel Core i5-8400 remains a relevant mid-range desktop processor, originally launched in October 2017 as part of Intel's Coffee Lake architecture. While it is now over six years old, its performance in both single-core and multi-core workloads still places it within a competitive tier of mainstream CPUs. The Core i5-8400 features six cores and six threads, operating at a base frequency of 2.8 GHz with a turbo boost up to 4.0 GHz under optimal conditions. It is built on a 14 nm process node and uses the LGA-1151 socket, making it compatible with Intel's 300 and 100/200 series chipsets. With a TDP of 65 W, the processor delivers efficient power consumption for typical desktop usage scenarios.

The integrated UHD Graphics 630 GPU offers modest performance suitable for basic multimedia, light gaming, and video playback. It operates at a base frequency of 350 MHz and can boost up to 1.05 GHz, supporting up to three displays and providing a solid foundation for users who do not require a discrete graphics card. The processor supports DDR4-2666 memory in a dual-channel configuration, delivering a maximum memory bandwidth of 42.7 GB/s, though actual performance may vary depending on memory module quality and system configuration.

In terms of real-world performance, the Core i5-8400 scores 5459 in the overall PassMark benchmark, ranking #513 out of 2060 processors. Its single-core performance is particularly strong, with a score of 5701 and a rank of #418, placing it ahead of many modern processors in this category. This indicates that the CPU remains highly capable for applications that rely on high clock speeds, such as gaming and productivity tasks. The multicore score of 5097 ranks it #568, where it competes closely with higher-end CPUs like the Xeon E5-1650 v2 and Core i7-8709G, though it trails behind more recent offerings.

The processor supports a wide array of modern technologies, including Intel’s Turbo Boost 2.0, Enhanced SpeedStep, and Intel VT-x virtualization. It also includes support for AVX and AVX2 instruction sets, which are essential for compute-intensive applications such as video encoding and scientific simulations. The 9 MB L3 cache and 1.5 MB L2 cache contribute to efficient data handling, while the 0.375 MiB L1 cache ensures fast access to frequently used instructions.

Despite its age, the Core i5-8400 remains a viable option for budget-conscious users and those building systems where integrated graphics are sufficient. While newer processors offer significantly better performance and energy efficiency, the i5-8400 continues to hold its ground in single-threaded workloads and light multitasking environments. For users seeking a reliable, cost-effective solution without the need for cutting-edge performance, the Core i5-8400 remains a practical choice in the evolving landscape of consumer CPUs.
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Intel Core i5-8400

Main Specifications

Designer: Intel
Name: Core i5-8400
Family: Core
Series: i5-8000
Model Number: i5-8400
Cores: 6
Threads: 6
Base Frequency: 2800 MHz
Turbo Frequency (1 core): 4000 MHz
Turbo Frequency (2 cores): 3900 MHz
Turbo Frequency (3 cores): 3900 MHz
Turbo Frequency (4 cores): 3900 MHz
Clock Multiplier: 28x (locked)
Microarchitecture: Coffee Lake
Core Name: Coffee Lake S
Core Family: 6
Core Model: 158
Socket: LGA-1151
Package: FCLGA-1151
Chipset: 300
Target Segment: Desktop
Max CPUs: 1
TDP: 65 W
Release Price: $182.00

Cache Specifications

L1 Cache: 384 KiB
L1 Instruction Cache: 192.512 KiB (8-way set associative)
L1 Data Cache: 192.512 KiB (8-way set associative)
L2 Cache: 1.5 MiB (4-way set associative)
L3 Cache: 9 MiB (12-way set associative)

Memory Specifications

Supported Memory Type: DDR4-2666
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: 1050 MHz
Execution Units: 24

Physical Specifications

Process: 14 nm
Die Area: 149 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 TBT 2.0 EIST SST TXT vPro VT-x VT-d EPT MPX SGX Secure Key SMEP IPT TSX Flex Memory MWT ISRT
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