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Head to head · Prices checked Nov 14, 2026

HMX GB40 vs NIUNIU Roly poly 40 R3

Get the HMX GB40 for sound dampening. Get the NIUNIU Roly poly 40 R3 for vial.

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Quick verdict

Which one should you get?

Get the

HMX GB40

Sound dampening

Build quality in the bottom 50% of 40% boards under $150.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.

Get the

NIUNIU Roly poly 40 R3

VIAL

Build quality in the top 40% of 40% boards under $150.

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

NIUNIU Roly poly 40 R3

  • Connection

    Bluetooth, Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Mount style

    Gasket Mount

    Top Mount

  • Sound dampening

    Yes

    No

  • Backlight

    RGB, south-facing

    None

    RGB for looks and low light rather than speed

  • VIAL

    No

    Yes

    GUI remapping on boards that do not ship VIA

KeebFinder scores

How we score
  • HMX GB40
  • NIUNIU Roly poly 40 R3
Performance
56
47
Build quality
67
74
Productivity
56
51
Customizability
56
70
Portability
84
80

What they share

  • Layout size: 40%
  • Hot-swappable
  • Case material: Aluminum
See every spec side by side

Full specs

HMX GB40 vs NIUNIU Roly poly 40 R3 specs

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

7 of 17 specs differ

HMX GB40

NIUNIU Roly poly 40 R3

Typing & switches

Switch options

—
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Top Mount

Sound dampening

Yes
No

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

USB-C

Yes
No

Build & materials

Case material

Aluminum
Aluminum

Plate material

—
FR4

Keycaps

ABS, PBT
—

Typing angle

6°
9°

Backlight

RGB, south-facing
None

Firmware & software

VIAL

No
Yes

Extras

Released

2025
2025

Where to buy

Compare prices

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

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HMX GB402 stores

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