Core i5-9400T

Name: Intel Core i5-9400T
Brand: Intel
Rating: 3.9 (10 reviews)

6 cores · 6 threads · up to 3.4 GHz on FCLGA1151.

3.9 · 10 votes

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Cores

Threads

Boost

3.4 GHz

L3 cache

9 MB

TDP

35W

Socket

FCLGA1151

Performance breakdown

Gaming5

Productivity5

Single-core5

Multi-core25

Power efficiency4

Lab scores

Performance score5

Cores6

Threads6

Boost clock (GHz)3.4 GHz

Estimated gaming FPS

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

1080p11 fps

1440p9 fps

4K6 fps

Full specifications

Processor & cores

Architecture: Coffee Lake
Process node: 14 nm
Socket: FCLGA1151
Release year: 2019
Total cores: 6
Threads: 6
Integrated graphics: Intel UHD Graphics 630

Clocks & cache

Base clock: 1.8 GHz
Boost clock: 3.4 GHz
Multiplier: 18
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 its low power draw and cool, quiet operation for basic office builds and HTPCs. The main gripe is its six threads can feel sluggish under heavier multitasking loads.

Pros

Sips power, stays whisper quiet
Plenty for daily office tasks
Runs cool in tiny cases
Handles light gaming without fuss

Cons

Locked multiplier limits overclocking
No hyperthreading for multitasking
Outdated socket with no upgrade path

Verdict

Our verdict on the Core i5-9400T

Intel's i5-9400T is a low-power Coffee Lake chip that trades performance for extreme energy efficiency in compact office PCs.

Get it if you need a low-power chip for a tiny office PC or home server that runs cool and quiet. Skip it if you want to game or edit video, as its few cores and threads will hold you back.