Head to head · Prices checked Nov 7, 2026

Nuphy Air75 V2 vs Keychron K3 Ultra

Get the Nuphy Air75 V2 for the 4,000 mAh battery. Get the Keychron K3 Ultra for the 8,000 Hz polling rate.

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Battery

Nuphy Air75 V2

No reviews

from$75at Nuphy

Compare 3 stores

polling rate

Keychron K3 Ultra

2.8 (6)2.8 · 6 reviews

from$109at MK

Compare 4 stores

Quick verdict

Which one should you get?

Get the

Nuphy Air75 V2

Battery

Build quality in the top 15% of 75% boards under $100.

Rules this board out

Low-profile switches and keycaps only. Standard MX keycaps will not fit.
South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
No ISO layout. ISO-DE, UK, and other ISO variants are not offered.

$75 at Nuphy

Get the

Keychron K3 Ultra

polling rate

Build quality in the top 25% 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.

$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 V2

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
Linear, Low-profile Mechanical, Tactile
Clicky, Linear, Tactile
Layout standard
ANSI
ANSI, ISO
ISO and JIS exist so regional layouts fit

KeebFinder scores

How we score

Nuphy Air75 V2
Keychron K3 Ultra

Performance: 81
86
Build quality: 80
75
Productivity: 88
89
Customizability: 94
86
Portability: 79
82

What they share

Layout size: 75%
Connection: Bluetooth, 2.4 GHz, Wired
Hot-swappable
Low profile
QMK
VIA

See every spec side by side

Full specs

Nuphy Air75 V2 vs Keychron K3 Ultra specs

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

9 of 26 specs differ

Spec

Nuphy Air75 V2

Keychron K3 Ultra

Typing & switches

Switch options

Linear, Low-profile Mechanical, Tactile

Clicky, Linear, Tactile

Hot-swappable

Yes

Mount style

—

Plate Mount

Low profile

Yes

Sound dampening

Yes

Layout

Layout size

75%

Layout standard

ANSI

ANSI, ISO

Ergonomics

Standard

Display

None

Media keys

Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz

8,000 HzBetter

Battery

4,000 mAhBetter

2,600 mAh

USB-C

Yes

Build & materials

Case material

ABS, Aluminum

ABS, Wood

Plate material

Aluminum

Keycaps

PBT

Weight

598 g

—

Dimensions

14 x 316 x 133 mm

—

Typing angle

9°

—

Backlight

RGB, south-facing

RGB, north-facing

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2023

2026

For EU buyers

ISO layouts by store

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

Nuphy Air75 V2

No ISO layout at the stores we track.

Keychron K3 Ultra

Keychron
ISO
In stockShips to you
Keychron (DE)
ISO
In stockDoes not ship to you

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 V23 stores