Keychron C3 HE vs K2 UltraMagnetic or Wireless
Choose the C3 HE for Hall Effect gaming and a full-size numpad, or the K2 Ultra for wireless flexibility and a smaller footprint.
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from$119at MK
Which one should you get?
Get the
Keychron C3 HE
Hall effect
Build quality in the top 10% of 100% boards under $100.
- Hall Effect magnetic switches with adjustable actuation points from 0.1 to 3.35 mm, as described by Keychron.
- Gaming features include Rapid Trigger, Dynamic Keystrokes, Snap Click, and Analog Mode.
- 100% ANSI layout includes a numpad and multi-media keys.
- Magnetic switches only. Standard MX switches will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
- No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
Get the
Keychron K2 Ultra
polling rate
Build quality in the top 10% of 75% boards under $150.
- Tri-mode connectivity includes Bluetooth, 2.4 GHz, and wired USB-C.
- Compact 75% layout measures 312 x 122 mm and weighs 1084 g.
- 8000 Hz polling rate is listed for wired and 2.4 GHz modes.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- No numpad.
Choose the C3 HE if you want Hall Effect features such as adjustable actuation and Rapid Trigger, along with a full-size layout. Choose the K2 Ultra if wireless connectivity, a smaller footprint, or broader switch-swapping flexibility matters more. Check the C3 HE's magnetic-switch restriction before planning a switch change.
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 C3 HE
Keychron K2 Ultra
Layout size
100%
75%
Hall effect (magnetic)
Yes
No
Adjustable actuation helps in games and not in normal typing
Rapid trigger
Yes
No
Faster resets help in games and not in normal typing
Connection
Wired
Bluetooth, 2.4 GHz, Wired
Wireless for several devices and wired for lower latency
Max polling rate
1,000 Hz
8,000 Hz
Higher polling helps competitive FPS and does nothing for typing
- Keychron C3 HE
- Keychron K2 Ultra
- Performance
- 8890
- Build quality
- 8386
- Productivity
- 9594
- Customizability
- 9292
- Portability
- 4682
- Hot-swappable
- Switch options: Clicky, Linear, Tactile
- Mount style: Gasket Mount
- QMK
- VIA
- Sound dampening
What will you mostly use it for?
The K2 Ultra is the practical pick for wireless use and travel, while the C3 HE's compact gaming-specific Hall Effect feature set makes it a stronger fit for players who want adjustable actuation and Rapid Trigger. Office use depends on whether wireless flexibility or a numpad matters more. Programming is a close match, with QMK/VIA and Launcher customization on both, but different layout sizes. For modding, the K2 Ultra avoids the C3 HE's magnetic-switch limitation.
Pick the Keychron C3 HE
- The C3 HE uses Hall Effect magnetic switches and supports adjustable actuation, Rapid Trigger, Dynamic Keystrokes, and Analog Mode.
- The K2 Ultra has a higher listed 8000 Hz polling rate, compared with 1000 Hz for the C3 HE.
- The C3 HE is wired-only, while the K2 Ultra supports wired and 2.4 GHz connections.
Keychron C3 HE vs K2 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
10 of 28 specs differ
Keychron C3 HE
Keychron K2 Ultra
Switch options
Hall effect (magnetic)
Rapid trigger
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
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
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
Keychron C3 HE
No ISO layout at the stores we track.
Keychron K2 Ultra
Keychron (DE)
ISO-FR, ISO-ES, ISO-IT
In stockDoes not ship to you
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
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Lowest price across stores, Amazon excluded.
Keychron C3 HE vs K2 Ultra: your questions
The C3 HE is the more gaming-focused option, with Hall Effect switches, adjustable actuation, Rapid Trigger, Dynamic Keystrokes, and Analog Mode. The K2 Ultra instead lists an 8000 Hz polling rate for wired and 2.4 GHz modes, compared with 1000 Hz for the C3 HE.
No, the C3 HE is wired-only and uses USB-C connectivity. For wireless use, the K2 Ultra offers Bluetooth and 2.4 GHz connections, as well as wired mode.
No, the K2 Ultra has a 75% layout and its compatibility rules specify that it has no numpad. The C3 HE uses a 100% ANSI layout that includes a numpad.
No, the C3 HE compatibility rules specify that it accepts magnetic switches only, and standard MX switches will not fit. Keychron's vendor description also contains a conflicting MX hot-swap statement, so check the magnetic-switch restriction before buying switches.
Yes, the K2 Ultra is listed as hot-swappable, and Keychron describes switch replacement without soldering. Its listed switch options include Apex Red, Brown, and Banana.
The K2 Ultra is smaller, measuring about 312 x 122 mm, while the C3 HE measures about 365 x 138 mm. The K2 Ultra's 75% layout also omits the numpad found on the C3 HE.
Keychron lists up to 760 hours with backlighting off and up to 225 hours at the lowest RGB brightness, using its 4000 mAh battery. Battery life will depend on the lighting condition described in those figures.
Both keyboards list Mac/Windows support, and each vendor description specifies macOS and Windows compatibility. Both vendor listings also include Linux support.
The C3 HE has north-facing LEDs, and its compatibility rules warn that Cherry-profile keycaps can hit the switch housing. Consider that limitation when choosing replacement keycaps.
The metadata lists QMK and VIA support for both keyboards, and both vendor descriptions mention Keychron Launcher for key remapping and macros. The K2 Ultra vendor description identifies its firmware as ZMK, so verify which configuration tools and features meet your needs.
Both offer QMK/VIA support and Keychron Launcher remapping and macros, so the choice largely comes down to layout preference. The C3 HE has a full-size ANSI layout with a numpad, while the K2 Ultra uses a smaller 75% layout without one.
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