Core i5-8400T

Details and Benchmarks for Intel Core i5-8400T

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

5,250 Rank: 658
Rank Name Score Visual
654 Ryzen 3 PRO 2200GE 5,251
+0%
655 Core i5-8300H 5,251
+0%
656 Core i5-4670K 5,251
+0%
657 Core i7-8559U 5,250
+0%
658 Core i5-8400T 5,250
659 Core i7-4771 5,250
+0%
660 Core i7-3960X 5,249
+-0%
661 FX-8370E 5,249
+-0%
662 Core i5-10300H 5,248
+-0%
663 Ryzen 3 PRO 1300 5,246
-0.1%

View full ranking →

Multicore Score

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

5,049 Rank: 606
Rank Name Score Visual
602 Core i3-7101TE 5,054
+0.1%
603 Ryzen 3 4100 5,052
+0.1%
604 Core i7-6920HQ 5,051
+0%
605 Core i5-7600K 5,050
+0%
606 Core i5-8400T 5,049
607 Core i7-5775R 5,048
+-0%
608 Ryzen 5 PRO 4650U 5,048
+-0%
609 Core i7-9850HE 5,048
+-0%
610 Xeon E-2144G 5,047
+-0%
611 Xeon E3-1241 v3 5,046
-0.1%

View full ranking →

Singlecore Score

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

5,384 Rank: 659
Rank Name Score Visual
655 Xeon E3-1225 v5 5,386
+0%
656 Xeon E3-1246 v3 5,386
+0%
657 Ryzen 7 4800U 5,386
+0%
658 Core i3-9100T 5,385
+0%
659 Core i5-8400T 5,384
660 Core i7-5557U 5,384
+0%
661 Xeon E5-2690 v4 5,382
+-0%
662 Xeon E3-1275 v6 5,380
-0.1%
663 EPYC 7552 5,377
-0.1%
664 Xeon E5-4627 v4 5,377
-0.1%

View full ranking →

Workload Scores

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

Number Crunching

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

4,700 Rank: 672
Rank Name Score Visual
668 Core i7-6700 4,701
+0%
669 Core i5-1035G7 4,700
+0%
670 Xeon E3-1245 v5 4,700
+0%
671 Xeon Bronze 3106 4,700
+0%
672 Core i5-8400T 4,700
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
+-0%
677 Xeon E3-1270 v3 4,698
+-0%

View full ranking →

Data Processing

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

4,677 Rank: 737
Rank Name Score Visual
733 Xeon E3-1290 4,679
+0%
734 Core i7-6820EQ 4,678
+0%
735 Ryzen 3 3200G 4,678
+0%
736 Core i7-4770S 4,678
+0%
737 Core i5-8400T 4,677
738 Core i3-9350KF 4,675
+-0%
739 Core i7-6700T 4,675
+-0%
740 Core i5-8305G 4,675
+-0%
741 Core i7-3770S 4,675
+-0%
742 Xeon E3-1230 V2 4,675
+-0%

View full ranking →

Physics & Compute

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

4,788 Rank: 594
Rank Name Score Visual
590 Core i7-4930K 4,790
+0%
591 Xeon E3-1245 v6 4,789
+0%
592 Xeon D-1540 4,789
+0%
593 Core i5-8500T 4,789
+0%
594 Core i5-8400T 4,788
595 Ryzen 5 2600 4,787
+-0%
596 Core i7-10710U 4,787
+-0%
597 Core i7-8809G 4,786
+-0%
598 Core i7-3970X 4,786
+-0%
599 Xeon E5-2670 4,786
+-0%

View full ranking →

Core i5-8400T Details

Built on Intel's Coffee Lake microarchitecture and fabricated on a 14 nm process, the Core i5-8400T is a low-power desktop processor designed for energy-efficient performance. Launched in April 2018, it represents an older generation of Intel's Core i5 lineup, and while it is no longer at the forefront of performance, it remains relevant for basic computing tasks and embedded systems. With a TDP of just 35 W, the i5-8400T is optimized for systems where thermal and power constraints are a priority, such as compact PCs or office workstations.

The processor features six cores and six threads, operating at a base frequency of 1.7 GHz with a maximum turbo frequency of 3.3 GHz when running a single core. This boost capability allows it to handle demanding workloads more efficiently than its base frequency might suggest. It supports dual-channel DDR4-2666 memory and is paired with the UHD Graphics 630 integrated GPU, which runs at 350 MHz and can boost up to 1.05 GHz. The GPU supports up to three displays and is suitable for light multimedia use, but not for modern gaming or intensive graphics work.

The i5-8400T is equipped with a 9 MB L3 cache and 1.5 MB of L2 cache, with 0.188 MB each of L1 instruction and data caches, contributing to efficient data access. It uses the LGA-1151 socket and supports Intel's 300 series chipsets, making it compatible with a range of mainstream motherboards from its era. The processor includes advanced features such as Intel's Turbo Boost 2.0, Intel VT-x and VT-d virtualization, AES-NI encryption, and AVX/AVX2 instruction sets, enabling it to perform well in virtualized environments and compute-heavy applications.

In benchmark testing, the Core i5-8400T achieves an overall score of 5250, placing it at #657 among 2060 processors. Its single-core score of 5384 ranks it #659, indicating strong performance in applications that rely on high clock speeds. The multicore score of 5049 places it at #606, showing solid multi-threaded capabilities for its class. While it is outperformed by modern processors, it competes favorably with other low-power desktop CPUs like the Ryzen 3 4100 and Core i7-8705G.

As of March 2026, the Core i5-8400T remains a viable option for users seeking a reliable, low-power CPU for office productivity, media playback, and light content creation. It is not suited for gaming or high-end computing, but its efficiency and integration make it a practical choice for small form factor systems or servers where power consumption is a concern.
Frequently Compared

Intel Core M3-7Y32 4 views

AMD Ryzen 3 PRO 2200GE 1 view

AMD Ryzen 9 PRO 3900 1 view

AMD Ryzen 5 PRO 3500U 1 view

Intel Xeon Silver 4214 1 view

Intel Xeon Silver 4210 1 view

Intel Xeon Silver 4109T 1 view

Intel Core i7-7660U 1 view

Intel Core i5-8400T

Main Specifications

Designer: Intel
Name: Core i5-8400T
Family: Core
Series: i5-8000
Model Number: i5-8400T
Cores: 6
Threads: 6
Base Frequency: 1700 MHz
Turbo Frequency (1 core): 3300 MHz
Turbo Frequency (2 cores): 3200 MHz
Turbo Frequency (3 cores): 3100 MHz
Turbo Frequency (4 cores): 3100 MHz
Clock Multiplier: 17x (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: 35 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 TXT VT-x VT-d EPT MPX SGX Secure Key SMEP IPT TSX
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