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
- HMX GB40
- MMD KM40
- Performance
- 5861
- Build quality
- 6983
- Productivity
- 5769
- Customizability
- 5784
- Portability
- 8484
- Layout size: 40%
- Hot-swappable
- Case material: Aluminum
- Mount style: Gasket Mount
- Sound dampening
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
HMX GB40
No owner reviews collected yet.
MMD KM40
4 owner reviews
“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”
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
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Connection
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Typing angle
Backlight
QMK
VIA
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
Not sold on either?
Still torn?
Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.










![[In Stock] GuangQi40 40% Mechanical Keyboard](https://cdn.shopify.com/s/files/1/0549/0262/0278/files/3_f9db0f02-e41b-4619-910e-31d54b65865c.png?v=1735804775&width=3840&quality=75)