Keychron K2 Max vs K5 Ultra75% or Full-Size?
Choose the K2 Max for a compact 75% layout and broader switch customization, or the K5 Ultra for a full-size low-profile layout, integrated knob, and higher polling rate.
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4.5 (2)4.5 · 2 reviews
from$94at Keychron
4.8 (5)4.8 · 5 reviews
from$114at Keychron
Which one should you get?
Get the
Keychron K2 Max
Battery
Build quality in the top 10% of 75% boards under $100.
- 75% layout with a more compact footprint than the K5 Ultra.
- 4000 mAh battery and 1000 Hz polling rate.
- QMK and VIA support, plus Keychron Launcher for remapping and macros.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- Missing ISO-FR, ISO-ES, ISO-IT. The other board is sold in those layouts.
- No numpad.
Get the
Keychron K5 Ultra
polling rate
Build quality in the top 15% of 100% boards under $150.
- 100% full-size layout with an integrated knob for volume control by default.
- 8000 Hz polling rate in wired and 2.4 GHz modes.
- Low-profile design with an aluminum and wood frame and an aluminum alloy plate.
- 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-UK, ISO-Nordic, ISO-SW. The other board is sold in those layouts.
Choose the K2 Max if you want a smaller 75% keyboard, QMK, and access to a broad range of MX-style switches. Choose the K5 Ultra if you need a numpad, prefer a low-profile board with an integrated knob, or value its higher listed polling rate. Check regional layout and keycap compatibility before ordering either model.
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 K2 Max
Keychron K5 Ultra
Layout size
75%
100%
Battery
4,000 mAh
2,600 mAh
A larger battery means fewer cables during the day
Low profile
No
Yes
Max polling rate
1,000 Hz
8,000 Hz
Higher polling helps competitive FPS and does nothing for typing
Case material
ABS, Aluminum
ABS, Metal, Wood
- Keychron K2 Max
- Keychron K5 Ultra
- Performance
- 8191
- Build quality
- 8575
- Productivity
- 9593
- Customizability
- 9189
- Portability
- 7956
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Switch options: Clicky, Linear, Tactile
- QMK
- VIA
- Sound dampening
What will you mostly use it for?
The K5 Ultra has the edge for gaming on its listed polling rate and for desk workflows that benefit from a numpad and knob. The K2 Max is the more suitable pick when compactness, MX-style switch options, and QMK are priorities. For travel, the smaller 75% form factor gives the K2 Max a practical advantage, although the K5 Ultra is lighter by listed weight. Each board offers wireless and wired use, hot-swapping, and remapping support, so the preferred layout and profile should guide the final choice.
Pick the Keychron K5 Ultra
- The K5 Ultra lists an 8000 Hz polling rate in wired and 2.4 GHz modes, compared with 1000 Hz for the K2 Max.
- Both support 2.4 GHz wireless and wired connections, as well as N-key rollover.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron K2 Max
2 owner reviews
“Négatif: Le temps de livraison et la clareté des infos”
Keychron K5 Ultra
5 owner reviews
“This keyboard is exactly what I was looking for. Low profile, great switches, not uber gamery. Very happy so far, hopefully it keeps working for a long time.”
Keychron K2 Max vs K5 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
13 of 28 specs differ
Keychron K2 Max
Keychron K5 Ultra
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
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
Keychron K2 Max
Keychron
ISO-DE, ISO-UK, ISO-Nordic, ISO-SW
In stockShips to you
Keychron (DE)
ISO-DE, ISO-UK, ISO-SW
Out of stockDoes not ship to you
Keychron K5 Ultra
Keychron (DE)
ISO-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 K2 Max vs K5 Ultra: your questions
The K5 Ultra lists 8000 Hz polling in wired and 2.4 GHz modes, while the K2 Max lists 1000 Hz. Both support 2.4 GHz, wired connections, and N-key rollover, so the K5 Ultra is the clearer fit if polling rate is your deciding factor.
The K2 Max has a 75% layout and no numpad. The K5 Ultra is a 100% full-size keyboard with a numpad and integrated knob.
The K5 Ultra has a 100% layout that includes a numpad. The K2 Max is a 75% board and its compatibility details specify that it has no numpad.
Keychron lists up to 370 hours for the K5 Ultra with backlighting off, compared with up to 190 hours for the K2 Max. Their listed battery capacities are 2600 mAh for the K5 Ultra and 4000 mAh for the K2 Max, so capacity alone does not indicate the stated runtime.
Both models list hot-swappable switches. Keychron says the K2 Max accepts almost all 3-pin and 5-pin MX-style mechanical switches, while the K5 Ultra requires low-profile switches.
No. The K5 Ultra requires low-profile switches and keycaps, and standard MX keycaps will not fit.
The K2 Max has south-facing LEDs, which can leave shine-through legends dark, according to its compatibility details. The K5 Ultra's listed low-profile double-shot PBT keycaps are non-shine-through.
The K2 Max is listed in ISO, ISO-DE, ISO-UK, ISO-Nordic, and ISO-SW variants, but not ISO-FR, ISO-ES, or ISO-IT. The K5 Ultra is listed in ISO, ISO-DE, ISO-ES, ISO-FR, and ISO-IT variants, but not ISO-UK, ISO-Nordic, or ISO-SW.
Both keyboards support Bluetooth, 2.4 GHz wireless, and wired USB-C connectivity. Keychron says each can connect to up to three devices over Bluetooth.
The K2 Max lists QMK firmware, while the K5 Ultra lists ZMK firmware. Both also list VIA support and Keychron Launcher for customization.
The K5 Ultra has an integrated aluminum knob that controls volume by default, and Keychron says it can be customized for commands including zoom and brush size. The K2 Max's listed features do not include a knob.
The K2 Max is the smaller layout at 75%, with listed dimensions of 32 x 317 x 122 mm. The K5 Ultra is full-size and measures 436.6 x 128.29 mm, so it takes up more desk space.
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