Core i5-8400T

Name: Intel Core i5-8400T
Brand: Intel
Rating: 3.9 (14 reviews)

6 cores · 6 threads · up to 3.3 GHz on FCLGA1151.

3.9 · 14 votes

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Cores

Threads

Boost

3.3 GHz

L3 cache

9 MB

TDP

35W

Socket

FCLGA1151

Performance breakdown

Gaming4

Productivity4

Single-core4

Multi-core25

Power efficiency3

Lab scores

Performance score4

Cores6

Threads6

Boost clock (GHz)3.3 GHz

Estimated gaming FPS

Paired with a high-end GPU. CPU impact is largest at 1080p.

1080p9 fps

1440p7 fps

4K5 fps

Full specifications

Processor & cores

Architecture: Coffee Lake
Process node: 14 nm
Socket: FCLGA1151
Release year: 2018
Total cores: 6
Threads: 6
Integrated graphics: Intel UHD Graphics 630

Clocks & cache

Base clock: 1.7 GHz
Boost clock: 3.3 GHz
Multiplier: 17
L1 cache: 384 KB
L2 cache: 1.5 MB
L3 cache: 9 MB

Memory & platform

Memory support: DDR4-2666
Max capacity: 128 GB
Channels: 2
Max bandwidth: 42.671 GB/s
Base power (TDP): 35W
Max temperature: 100°C
PCIe: PCIe 3.0
Launch price: $182

Technologies

Instruction sets: SSE4.1, SSE4.2, AVX2
Extensions: AES-NI, AVX, VT-x, VT-d

Community Feedback

What Owners Say

Owners like how it sips power and runs cool for basic office work or a home server. The usual complaint is that it feels slow for anything beyond light multitasking.

Pros

Handles office work without complaint
Stays cool in small cases
Sips power for always-on builds
Plays older games just fine

Cons

Locked to the motherboard chipset
No overclocking at all
Slower than newer budget CPUs

Verdict

Our verdict on the Core i5-8400T

A low-power, six-core Coffee Lake CPU that trades performance for a 35W thermal limit, making it a quiet office chip.

Get it if you need a low-power CPU for a compact office PC or home server that stays cool without a fuss. Skip it if you want to game or edit video, as its six cores will feel slow for modern tasks.