True Score Methodology v1.0

Logitech K840 Mechanical Keyboard Review

Name: Logitech K840 Mechanical Keyboard
Brand: Logitech

August 15, 2023

True Score

50

Total Dud

53

1

Experts

84

693

Consumers

Expert Rankings

(

1

)

The Logitech K840 delighted expert testers with its remarkably low latency and typing noise. They were pleased that its Romer-G Tactile key switches offered an excellent typing experience but were disappointed with its lack of backlighting. They also complained that its keys were not programmable and lamented the absence of a wrist rest.

Logitech K840 Mechanical Keyboard with Romer G mechanical Switches for PC

$129.79

See Deal

See all stores

We’re reader-supported. $$ from affiliate links finance our mission. Our ‘True Score‘ system independently powers ratings. No sponsored results. Ever. Learn more

Table of Contents

What Is Not on the Box
Overview
Product Comparison
All Stores
Score Card
Expert Score Breakdown
Learn More About Keyboard

What Is Not on the Box

What the brand doesn’t always tell you…

our Verdict

The Logitech K840 had testers happy with its exceptionally low latency and relatively quiet typing noise. Expert testers from Rtings did not notice or complain…

The Logitech K840 had testers happy with its exceptionally low latency and relatively quiet typing noise. Expert testers from Rtings did not notice or complain about any lagging during their tests, and they were also pleased with typing quality. They credited their good typing experience to the keyboard’s Romer-G Tactile key switches, which they also credited as the main reason why its typing noise was very low. As a result, they deemed it fit for office use, Reviewers from 9to5 Toys were also impressed with the K840’s build quality, as they found it quite sturdy.

However, product reviewers were not very happy with its lack of backlighting. Being a drawback that it shares with the Logitech K480 (which we’ve covered in our Logitech K480 Bluetooth Multidevice keyboard review), it might be challenging to use in low light conditions. They were also dissatisfied with its lack of programmable keys and missing wrist rest.

True Score

50

Reasons to Buy

Outstandingly low latency
Good build quality
Low typing noise
Good typing experience
Full-size keyboard

Reasons to Avoid

No backlighting
No wrist rest
Keys are not programmable

Specifications

Foldable
No
Form Factor
Full size
Key Switch Behavior
Tactile
Keyboard Technology
Mechanical
Multimedia Keys
Yes
Numeric Keypad
Yes
Palm Rest
na
Spill Resistant
Yes
Touchpad
na

Overview

Launched in 2017, the Logitech K840 is an entry-level mechanical keyboard that has an excellent 2.1ms latency, which is quite common with some of the best keyboards on the market. This low latency means it is very responsive to key presses, and since it ships with Romer-G tactile switches, typing on it feels quite comfortable. The wired keyboard offers one incline setting, and even though its cord is not detachable, it extends to a comfortable 5.9ft. Being a full-size keyboard, the K840 will also take up a decent amount of desk space, measuring about 17.5 by 5.2 inches. The K840 does not have a backlight, but if this is something that cannot be compromised on, then the Logitech G815 with its RGB backlighting may be well worth looking into. Find out what else it has to offer by reading through our Logitech G815 LIGHTSYNC RGB review.

Get the Winner of the Day Direct to Your Inbox

Product Comparison

	Logitech K840 Mechanical Keyboard Review	Logitech K845 Review	Logitech G413 SE Review	HyperX Alloy FPS RGB Review
True Score	50	70	65	87
Market Context	–	The Logitech K840 Mechanical keyboard does not feature a backlight, while the Logitech K845 does. However, the K840 ships with Romer-G Tactile key switches that make its typing noise a lot quieter than the K845, which ships with Cherry MX Blue key switches. Lastly, the K840 has a much lower latency of 2.1 ms compared to the K845, which is18.9ms. If this still sounds interesting, you can go ahead and have a look at our Logitech K845 review to find out what else it has to offer. Read more ↓	The Logitech K840 keyboard doesn’t have backlighting, but the Logitech G413 is equipped with red backlighting. Also, the G413 has a slightly lower latency of 1.9ms compared to the K840, which has a latency of 2.1ms. Read more ↓	The Logitech K840 is a full-size mechanical keyboard, while the HyperX Alloy FPS Pro is a TenKeyLess mechanical keyboard. However, the Alloy FPS Pro has red backlighting while the K840 has no backlighting, and its cord is detachable, while the one on the K840 is not. Still, the K840 has a much lower latency of 2.1ms compared to the Alloy FPS Pro, which has a latency of 10.9ms. Read more ↓
Keyboard Technology	Mechanical	Mechanical	Mechanical	Mechanical
Key Switch Behavior	Tactile	Linear	Tactile	Linear
Touchpad	No	No	No	No
Palm Rest	No	No	No	No
Spill Resistant	Yes	Yes	No	No
Dig Deeper	–	Read Review →	Read Review →	Read Review →