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Head to head · Prices checked Nov 12, 2026

Nuphy Air75 V3 Moonbow Edition vs Keychron K3 Ultra

Get the Nuphy Air75 V3 Moonbow Edition for the 4,000 mAh battery. Get the Keychron K3 Ultra for the 8,000 Hz polling rate.

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Quick verdict

Which one should you get?

Get the

Nuphy Air75 V3 Moonbow Edition

Battery

Build quality in the top 35% of 75% boards under $150.

Rules this board out

  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
$150 at Nuphy

Get the

Keychron K3 Ultra

polling rate

Build quality in the top 30% of 75% boards under $150.

Rules this board out

  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
  • Missing ISO-DE, ISO-UK, ISO-FR. The other board is sold in those layouts.
$109 at MK

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.

Nuphy Air75 V3 Moonbow Edition

Keychron K3 Ultra

  • Battery

    4,000 mAh

    2,600 mAh

    A larger battery means fewer cables during the day

  • Max polling rate

    1,000 Hz

    8,000 Hz

    Higher polling helps competitive FPS and does nothing for typing

  • Case material

    ABS, Aluminum

    ABS, Wood

  • Switch options

    Low-profile 3.0

    Clicky, Linear, Tactile

  • Mount style

    Gasket Mount

    Plate Mount

KeebFinder scores

How we score
  • Nuphy Air75 V3 Moonbow Edition
  • Keychron K3 Ultra
Performance
78
86
Build quality
73
75
Productivity
84
89
Customizability
78
86
Portability
82
82

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Low profile
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

Full specs

Nuphy Air75 V3 Moonbow Edition vs Keychron K3 Ultra specs

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

13 of 27 specs differ

Nuphy Air75 V3 Moonbow Edition

Keychron K3 Ultra

Typing & switches

Switch options

Low-profile 3.0
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Plate Mount

Low profile

Yes
Yes

Sound dampening

Yes
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI, ISO, ISO-DE, ISO-FR, ISO-UK, JIS
ANSI, ISO

Ergonomics

Standard
Standard

Knob

Yes
No

Display

LED
None

Media keys

Yes
No

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz
8,000 HzBetter

Battery

4,000 mAhBetter
2,600 mAh

USB-C

Yes
Yes

Build & materials

Case material

ABS, Aluminum
ABS, Wood

Plate material

Polycarbonate
Aluminum

Keycaps

PBT
PBT

Weight

724 g
—

Dimensions

13 x 319 x 129 mm
—

Typing angle

10°
—

Backlight

RGB, north-facing
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2026
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.

Nuphy Air75 V3 Moonbow Edition2 stores
Keychron K3 Ultra4 stores

For EU buyers

ISO layouts by store

Which stores sell ISO-DE, UK, and the other regional layouts.

Nuphy Air75 V3 Moonbow Edition

Listed on the product, not split by store: ISO-DE, ISO-UK, ISO-FR.

Keychron K3 Ultra

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