Keychron K3 Max SE vs K3 UltraSpeed vs Features
Choose the K3 Max SE for its superior office features and build, or the K3 Ultra for its class-leading 8000 Hz wireless polling rate and battery life.
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5.0 (2)5.0 · 2 reviews
from$104at Keychron
4.3 (9)4.3 · 9 reviews
from$109at MK
Which one should you get?
Get the
Keychron K3 Max SE
Speed
Build quality in the top 35% of 75% boards under $150.
- Advanced sound dampening with EPDM foam, latex foam, PET film, and bottom case foam.
- Aluminum plate for a rigid and stable typing base.
- Wooden side frame adds a unique aesthetic and natural feel.
- Low-profile switches and keycaps only. Standard MX keycaps 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 K3 Ultra
Features
Build quality in the top 30% of 75% boards under $150.
- Class-leading 8000 Hz polling rate in both 2.4 GHz and wired modes.
- Outstanding battery life of up to 550 hours with backlight off.
- Ships with a large 2600 mAh battery.
- Low-profile switches and keycaps only. Standard MX keycaps will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
Choose the Keychron K3 Max SE if you value a quieter, more refined typing experience for office work or content creation. Its multi-layered acoustic foam and aluminum plate provide a superior feel for productivity tasks. Opt for the Keychron K3 Ultra if your priority is minimal latency in gaming or if you want to maximize time between charges. Its 8000 Hz polling rate and 550-hour battery make it a uniquely capable wireless performer.
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 Max SE
Keychron K3 Ultra
Battery
1,550 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
Layout standard
ANSI
ANSI, ISO
ISO and JIS exist so regional layouts fit
N-key rollover
Yes
No
- Keychron K3 Max SE
- Keychron K3 Ultra
- Performance
- 8086
- Build quality
- 7475
- Productivity
- 8989
- Customizability
- 8686
- Portability
- 8082
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Low profile
- Case material: ABS, Wood
- Switch options: Clicky, Linear, Tactile
What will you mostly use it for?
The K3 Ultra is the clear winner for gaming and travel due to its 8000 Hz polling rate and massive 2600 mAh battery. For office and content creation, the K3 Max SE takes the lead with more comprehensive sound dampening and a solid aluminum plate. The two are tied for programming as both offer the same quality keycaps, hot-swap sockets, and deep firmware customization via web apps. Modders may prefer the Max SE for its more intricate layered foam and plate system.
Pick the Keychron K3 Ultra
- Offers an 8000 Hz polling rate in both 2.4 GHz and wired modes for lower latency.
- ZMK firmware supports 8000 Hz polling in wireless mode, a rare feature.
- Battery life extends to up to 550 hours for extended gaming sessions.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron K3 Max SE
2 owner reviews
“Beautiful service from yourselves, got updates at every point required. Product is amazing and arrived wrapped well. Only issue was the courier delivering the parcel by throwing it into the house rather than handing it in person. Already reviewed their poor…”
Keychron K3 Ultra
9 owner reviews
“Portable, match my minimalist setup, great feeling, high quality, durable”
“Meh. I dont like the wood grain and they make it difficult to return or exchange”
Keychron K3 Max SE vs K3 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
4 of 24 specs differ
Keychron K3 Max SE
Keychron K3 Ultra
Switch options
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
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 Max SE
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
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.
Keychron K3 Max SE vs K3 Ultra: your questions
The Keychron K3 Ultra supports an 8000 Hz polling rate in both 2.4 GHz and wired modes, making it faster for gaming. The Keychron K3 Max SE has a standard 1000 Hz polling rate in the same modes.
Yes, both keyboards use low-profile, double-shot PBT keycaps in an LSA (low-profile spherical-angled) profile. They are not shine-through but are designed to resist oil and prevent legends from fading.
Yes, both the K3 Max SE and K3 Ultra feature a hot-swappable PCB. This allows you to easily change Keychron Milk POM low-profile switches without soldering.
The Keychron K3 Ultra has significantly better battery life, lasting up to 550 hours on a single charge. The K3 Max SE offers up to 120 hours, but the Ultra has a larger 2600 mAh battery compared to the Max SE's 1550 mAh.
The Keychron K3 Max SE uses the open-source QMK firmware, while the K3 Ultra uses ZMK firmware. Both are customizable via the Keychron Launcher web app for remapping keys and creating macros.
Yes, the K3 Ultra is better suited for gaming due to its 8000 Hz polling rate, which reduces input lag. The K3 Max SE's 1000 Hz polling rate is sufficient for most users but is not competitive for high-speed gaming.
The Keychron K3 Max SE is likely quieter. It includes a more comprehensive sound dampening system with EPDM foam, latex foam, PET film, and bottom case acoustic foam, all designed to reduce noise and vibration.
Both keyboards feature a wooden frame design. The K3 Max SE uses a lightweight polymer body with wooden side frames, while the K3 Ultra pairs natural wood with a precision metal frame.
The Keychron K3 Ultra is available in ISO layouts, including ISO-German, ISO-UK, and ISO-Nordic. The Keychron K3 Max SE is listed only with ANSI layout support.
Yes, both the K3 Max SE and K3 Ultra are compatible with macOS, Windows, and Linux. They come with keycaps and a switch on the side to easily toggle between the Mac and Windows operating systems.
Both the Keychron K3 Max SE and the Keychron K3 Ultra use plate-mounted stabilizers to keep larger keys stable during typing.
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