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Head to head · Prices checked Oct 31, 2026

Epomaker RT82 vs Zuoya GMK21 Numpad

Get the Epomaker RT82 for sound dampening. Get the Zuoya GMK21 Numpad for knob and qmk.

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EPOMAKER RT82

Sound dampening

Epomaker RT82

4.6 · 40 reviews

from$60at Epomaker

90-day low

Compare 2 stores
GMK21 Numpad Kit

Knob

Zuoya GMK21 Numpad

No reviews

from$35at ktechs

Compare 2 stores

Quick verdict

Which one should you get?

Get the

Epomaker RT82

Sound dampening

Build quality in the top 30% of 75% boards under $100.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
  • No numpad.
$60 at Epomaker

Get the

Zuoya GMK21 Numpad

Knob

Build quality in the top 10% of Numpad boards under $50.

Rules this board out

  • Numpad only. This is not a full keyboard.
$35 at ktechs

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.

Epomaker RT82

Zuoya GMK21 Numpad

  • Layout size

    75%

    Numpad

  • Knob

    No

    Yes

  • Display

    LCD

    None

    A case display rather than a typing feature

  • QMK

    No

    Yes

    The deep option when you want to remap every key

  • Sound dampening

    Yes

    No

KeebFinder scores

How we score
  • Epomaker RT82
  • Zuoya GMK21 Numpad
Performance
78
62
Build quality
74
79
Productivity
82
65
Customizability
78
94
Portability
79
65

What they share

  • Hot-swappable
  • VIA
See every spec side by side

Full specs

Epomaker RT82 vs Zuoya GMK21 Numpad specs

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

10 of 25 specs differ

Epomaker RT82

Zuoya GMK21 Numpad

Typing & switches

Switch options

Linear, Silent
—

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Sound dampening

Yes
No

Layout

Layout size

75%
Numpad

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

LCD
None

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
—

Max polling rate

1,000 Hz
—

Battery

4,000 mAh
—

USB-C

Yes
No

Build & materials

Case material

ABS
—

Plate material

Polycarbonate
—

Keycaps

PBT
—

Weight

1,000 g
—

Dimensions

40 x 327 x 143 mm
—

Typing angle

5°
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

VIA

Yes
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
No

Extras

Released

2025
2026

Where to buy

Compare prices

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

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.

Lowest price across stores, Amazon excluded.

Epomaker RT822 stores
Zuoya GMK21 Numpad2 stores

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