Keychron K3 HE vs K3 UltraMagnetic vs 8K Polling
Choose the K3 HE for adjustable magnetic switch features or the K3 Ultra for superior wireless polling and extended battery life.
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4.4 (8)4.4 · 8 reviews
from$119at Keychron
2.8 (6)2.8 · 6 reviews
from$109at MK
Which one should you get?
Get the
Keychron K3 HE
Magnetic
Build quality in the top 10% of 75% boards under $150.
- Hall Effect magnetic switches with adjustable actuation from 0.2 to 2.9 mm
- QMK open-source firmware with 256 KB flash for extensive customization
- Dedicated analog mode and Rapid Trigger for gaming precision
- Magnetic switches only. Standard MX switches will not fit.
- Low-profile switches and keycaps only. Standard MX keycaps will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
Get the
Keychron K3 Ultra
8K Polling
Build quality in the top 25% of 75% boards under $150.
- 8000 Hz polling rate in both wired and 2.4 GHz modes for extreme responsiveness
- Up to 550 hours of battery life enables weeks of use without charging
- ZMK firmware with 1 MB flash offers ample space for complex macros and layers
- 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-FR, ISO-ES. The other board is sold in those layouts.
The Keychron K3 HE is the right choice if you prioritize customizable magnetic switch features for gaming or programming. The Keychron K3 Ultra is better for users who value extreme battery life and the highest wireless polling rate available in a low-profile board. Your decision hinges on whether you want the most advanced switch technology in its class or the longest-lasting, fastest wireless performance.
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 HE
Keychron K3 Ultra
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
Max polling rate
1,000 Hz
8,000 Hz
Higher polling helps competitive FPS and does nothing for typing
Case material
ABS, Aluminum, Wood
ABS, Wood
Switch options
Clicky, Linear, Magnetic, Tactile
Clicky, Linear, Tactile
- Keychron K3 HE
- Keychron K3 Ultra
- Performance
- 9286
- Build quality
- 8675
- Productivity
- 8889
- Customizability
- 8986
- Portability
- 8282
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Battery: 2,600 mAh
- Low profile
- QMK
What will you mostly use it for?
For gaming, the K3 HE wins with magnetic switch features like Rapid Trigger and adjustable actuation. The K3 Ultra dominates office and travel use cases due to drastically better battery life and lighter weight. Programming and modding favor the K3 HE for its QMK firmware and customizable switch feel. Content creation leans toward the K3 Ultra for its high polling rate and larger flash memory. The tie in switch type (both offer linear/tactile options) means feel preference alone won't decide the winner.
Pick the Keychron K3 HE
- Hall Effect magnetic switches with adjustable actuation points from 0.2 to 2.9 mm
- Features Rapid Trigger, Snap Click, and Last Key Priority for competitive gaming
- Dynamic Rapid Trigger and analog mode for fluid control
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron K3 HE
8 owner reviews
“I am happy with this keyboard! I needed some time to adjust my typing habits, but so far so good.”
“please add a custom firmware file in your as the app can not recognize the keyboard and apparently doesn't have a correct firmware. the reset buttons do not work as well”
Keychron K3 Ultra
6 owner reviews
“I bought this keyboard to test for work. I love how sturdy it feels, the wood aspects make it feel premium as well. I opted for the banana switches, they do not disturb my colleagues and it feels great for everyday tasks. The battery also seems to hold out…”
“Meh. I dont like the wood grain and they make it difficult to return or exchange”
Keychron K3 HE vs K3 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
9 of 27 specs differ
Keychron K3 HE
Keychron K3 Ultra
Switch options
Hall effect (magnetic)
Rapid trigger
Hot-swappable
Mount style
Low profile
Sound dampening
Layout size
Layout standard
Ergonomics
Display
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 K3 HE
Keychron
ISO-DE
In stockShips to you
Keychron (DE)
ISO-DE, ISO-FR, ISO-ES
In stockDoes not ship to you
Keychron K3 Ultra
Keychron
ISO
In stockShips to you
Keychron (DE)
ISO
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 K3 HE vs K3 Ultra: your questions
No, the K3 HE is hot-swappable only with Keychron Ultra-Fast Lime Low-Profile magnetic switches. Standard mechanical switches are not compatible because the Hall Effect sensing requires specific magnetic switch components.
No, the 8000 Hz polling rate is available only in wired and 2.4 GHz modes. The specifications list 8000 Hz for 2.4 GHz and wired, while Bluetooth mode has a lower polling rate not explicitly stated in the provided data.
The K3 Ultra has much longer battery life at up to 550 hours, compared to the K3 HE's up to 55 hours. Both use a 2600 mAh lithium-polymer battery, but the K3 Ultra's ZMK firmware and components achieve greater efficiency.
Magnetic switches in the K3 HE use Hall Effect sensors for adjustable actuation points from 0.2 to 2.9 mm, along with features like Rapid Trigger and analog mode. Mechanical switches in the K3 Ultra provide a fixed actuation feel with options like linear Red or tactile Brown and Banana switches.
Yes, both keyboards support over 22 RGB backlight settings including per-key RGB and Mix RGB. Customization is done through the Keychron Launcher web app, which works with both QMK firmware (K3 HE) and ZMK firmware (K3 Ultra).
Both keyboards are low-profile, but the K3 HE features a switch height of 12.1mm and a front edge of 22.0mm, while the K3 Ultra has an 11.9mm switch height and 20.0mm front edge. The K3 Ultra is slightly thinner, but the difference is small.
Yes, both the K3 HE and K3 Ultra are compatible with macOS, Windows, and Linux. They include Mac/Win keycaps and offer easy system switching via dedicated toggles.
The K3 HE uses QMK open-source firmware with 256 KB flash, while the K3 Ultra uses ZMK firmware with 1 MB flash. Both support the Keychron Launcher web app for key remapping and macros.
Both keyboards feature LSA double-shot PBT keycaps that are not shine-through. This means the keycap legends do not allow backlight to pass through, but the PBT material resists oil and fading over time.
The K3 HE is more suitable for competitive gamers due to its Hall Effect switches with Rapid Trigger, Snap Click, and adjustable actuation points. These features allow faster, more precise inputs compared to the K3 Ultra's standard mechanical feel, despite the K3 Ultra's higher polling rate.
The K3 HE weighs 575g, while the K3 Ultra weighs 566g ± 10g. The difference is minimal, making both highly portable, but the K3 Ultra holds a slight edge for travel.
Yes, the K3 Ultra supports 8000 Hz polling in both 2.4 GHz wireless mode and wired mode. This is a significant advantage over the K3 HE, which maxes out at 1000 Hz in wired and 2.4 GHz modes.
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