Keychron K3 V3 vs Nuphy Air75 V3QMK vs Battery & Knob
Choose the Keychron K3 V3 for deep firmware customization with QMK, or the Nuphy Air75 V3 for superior battery life and a dedicated knob.
Which one should you get?
Get the
Keychron K3 V3
QMK
- Supports QMK and VIA open-source firmware for extensive key remapping and macros.
- Includes multiple layers of acoustic foam (IXPE, EPDM, latex) for sound dampening.
- Offers a wide array of ISO layout options (UK, DE, Swiss, Nordic).
- Smaller 1550mAh battery compared to the competition.
- Lacks a dedicated programmable knob.
- Hot-swap compatibility is limited to specific low-profile mechanical switches.
Get the
Nuphy Air75 V3
Battery & Knob
- Massive 4000mAh battery for long-lasting wireless use.
- Includes a programmable knob for media control or custom functions.
- Features a gasket mount design for a potentially softer typing feel.
- Does not support QMK or VIA firmware, relying on proprietary NuPhy IO 2.0 software.
- Fewer ISO layout options compared to the K3 V3.
- Heavier at 750g, which may affect portability despite the slim design.
Your priority dictates the choice. If you value deep, open-source firmware customization for layers and macros, the Keychron K3 V3 is the clear winner. If your needs center around all-day wireless battery life, a useful knob for quick controls, and a sleek, travel-ready form factor, the Nuphy Air75 V3 is the better fit. Both are competent low-profile keyboards, but they excel in fundamentally different areas.
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.
Keychron K3 V3
Nuphy Air75 V3
Connection
Bluetooth, Wired
Bluetooth, 2.4 GHz, Wired
Battery
1,550 mAh
4,000 mAh
Case material
ABS, Aluminum
ABS, Aluminum, Plastic, Polycarbonate
Switch options
Clicky, Linear, Tactile
Clicky, Linear, Low-profile 3.0, Mechanical, Tactile
Mount style
PCB Mount, Top Mount
Gasket Mount
- Keychron K3 V3
- Nuphy Air75 V3
- Performance
- 8282
- Build quality
- 8288
- Productivity
- 7097
- Customizability
- 8998
- Portability
- 7481
- Layout size: 75%
- Hot-swappable
- Low profile
- Max polling rate: 1,000 Hz
- QMK
- VIA
What will you mostly use it for?
The Nuphy Air75 V3 takes the lead for office work, travel, and content creation, primarily due to its exceptional battery life, included knob, and portable design. The Keychron K3 V3 is the stronger choice for programming and modding, thanks to its QMK/VIA firmware support and detailed acoustic foams. For gaming, the K3 V3 has a slight edge due to its vendor's emphasis on low latency, though both share a 1000Hz polling rate.
Pick the Keychron K3 V3
- The Keychron K3 V3 lists a 1000Hz polling rate in wired mode, a spec matched by the Air75 V3.
- The K3 V3's vendor page explicitly mentions low latency for competitive games.
- Both keyboards support N-key rollover for simultaneous key presses.
Keychron K3 V3 vs Nuphy Air75 V3 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
15 of 28 specs differ
Keychron K3 V3
Nuphy Air75 V3
Switch options
Hot-swappable
Mount style
Low profile
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
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Keychron K3 V3 vs Nuphy Air75 V3: your questions
The Nuphy Air75 V3 has a significantly larger 4000mAh battery. Its vendor page claims up to 1200 hours of use with RGB off. The Keychron K3 V3 has a 1550mAh battery, which will require more frequent charging.
Yes, but the method and depth differ. The Keychron K3 V3 uses open-source QMK and VIA firmware, allowing for extensive remapping, layers, and macros via a web app. The Nuphy Air75 V3 uses the proprietary NuPhy IO 2.0 software for customization.
Yes. The Nuphy Air75 V3 includes a programmable knob that can be configured for volume, zoom, or other bidirectional controls through its software.
Yes, but with a specific limitation. The hot-swappable version of the K3 V3 is compatible with Keychron Milk POM switches or Gateron/Keychron low-profile mechanical switches. It does not support low-profile optical switches.
The Nuphy Air75 V3 is thinner, with a height of 13mm compared to the Keychron K3 V3's 19mm. However, the Air75 V3 is heavier at 750g versus the K3 V3's 540g.
Yes. Both the Keychron K3 V3 and Nuphy Air75 V3 list Mac and Windows support. Each includes keycaps or a mode switch to facilitate switching between operating systems.
The Keychron K3 V3 uses a top mount and PCB mount design. The Nuphy Air75 V3 uses a gasket mount, which typically offers a softer, more cushioned typing feel.
The Keychron K3 V3's vendor page states its RGB version offers 22+ dynamic backlight settings. The Nuphy Air75 V3's description mentions a rhythm light bar and scenario-based lighting themes, but does not specify a number of effects.
Yes. The Keychron K3 V3 vendor page mentions redesigned stabilizers for less wobble. The Nuphy Air75 V3 is listed as having screw-in stabilizers, which are generally considered more stable and easier to modify than clip-in types.
The Keychron K3 V3 has a 1000Hz polling rate in wired mode, but its vendor page specifies a 90Hz polling rate in Bluetooth mode. For competitive gaming, a wired connection is recommended for the lowest latency.
While the full accessory list isn't detailed in the provided specs, the vendor description mentions accessories like the NuFolio carrying case and Airfeet multi-position stand as part of its mobile solution ecosystem.
The Nuphy Air75 V3 has a fixed 10° typing angle, with a 3-stage adjustable kickstand mentioned. The Keychron K3 V3 has a 3° fixed angle with three adjustable feet (2.5°, 4.2°, 6.5°).
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