Not sure which keyboard to choose? Try the Keyboard Finder now!

Head to head · Prices checked Oct 21, 2026

HMX GB40 vs MMD KM40

Get the MMD KM40 for qmk and via.

What actually differs

The differences that matter

Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.

HMX GB40

MMD KM40

  • Connection

    Bluetooth, Wired

    Bluetooth, 2.4 GHz, Wired

  • QMK

    No

    Yes

  • VIA

    No

    Yes

  • Keycaps

    ABS, PBT

    PBT

  • Backlight

    RGB, south-facing

    RGB

KeebFinder scores

How we score
  • HMX GB40
  • MMD KM40
Performance
58
61
Build quality
69
83
Productivity
57
69
Customizability
57
84
Portability
84
84

What they share

  • Layout size: 40%
  • Hot-swappable
  • Case material: Aluminum
  • Mount style: Gasket Mount
  • Sound dampening
See every spec side by side

From real owners

What owners say

Ratings and quotes collected from verified store reviews, including the critical ones.

HMX GB40

No owner reviews collected yet.

MMD KM40

5.0

4 owner reviews

Praise
“Keycaps are dyesub, but still PBT Tactile switches feature a proper tactile feeling with great typing experience The case feels and looks really premium layer activation could be nicer but in the end you just gotta get used to the board”
Andi· via MonacoKeys

Full specs

HMX GB40 vs MMD KM40 specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

6 of 20 specs differ

HMX GB40

MMD KM40

Typing & switches

Switch options

—
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

40%
40%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Connectivity & battery

Connection

Bluetooth, Wired
Bluetooth, 2.4 GHz, Wired

Battery

—
2,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Aluminum

Plate material

—
Polycarbonate

Keycaps

ABS, PBT
PBT

Weight

—
620 g

Typing angle

6°
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

VIA

No
Yes

Extras

Released

2025
2026

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

HMX GB402 stores
  • AmazonGlobal

    Check price
    ~$130Visit
  • MKUS

    Out of stock
    $130Visit
MMD KM402 stores
  • MonacoKeysDE

    In stock
    $84Visit
  • AmazonGlobal

    Check price
    ~$84Visit

Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Still torn?

Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.