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Compare Keychron K3 Max SE vs K3 Ultra Differences Side by Side

The Keychron K3 Max SE and K3 Ultra are both ultra-slim 75% low-profile keyboards with wood-accented frames, PBT keycaps, and Keychron Milk POM switches. The decision is hard because they share the same core design and brand DNA, but target different priorities. The Max SE focuses on quiet comfort with acoustic foam, all-metal construction, and extensive productivity features. The Ultra prioritizes raw speed with an 8000 Hz polling rate and exceptional battery life. This comparison helps buyers decide which trade-off matters most for their primary use case.

83
Keychron K3 Max SE QMK Wireless Custom Mechanical Keyboard
78
Keychron K3 Ultra 8K Wireless Custom Mechanical Keyboard

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5.0 (1)
0.0 (0)
  • Built with the ANSI layout standard
  • Connects via USB-C
  • Features N-key rollover
  • Has built-in sound dampening
  • Runs at a 1000 Hz polling rate
  • Equipped with a 1550 mAh battery
  • Weighs about 566 g
  • Sized at 20 x 319 x 126 mm
  • Made with a ABS, Wood case
  • Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
  • Built with the ANSI, ISO layout standard
  • Runs at a 8000 Hz polling rate
  • Offers Yes, Rgb RGB lighting
Scores
  • Performance: 80.3
  • Build Quality: 73.9
  • Productivity: 88.8
  • Customizability: 86.9
  • Portability: 79.8
Scores
  • Performance: 86.6
  • Build Quality: 69.2
  • Productivity: 70
  • Customizability: 86.5
  • Portability: 74.6
Name
Keychron K3 Max SE
Name
Keychron K3 Ultra
Release year
2026
Release year
2026
Switch Options
Linear, Tactile, Clicky
Switch Options
Linear, Tactile, Clicky
Profile
Low Profile
Profile
Low Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ANSI, ISO
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
1000 Hz
Polling Rate
8000 Hz
Battery capacity
1550 mAh
Battery capacity
-
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
-
Mount Style
-
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb
Case Colors
Case Colors
Case Material
ABS, Wood
Case Material
-
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
20 x 319 x 126 mm
Dimensions
-
Weight
566g
Weight
-
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Pros and Trade-offs

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.

Keychron K3 Max SE

  • +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.
  • +Supports N-Key Rollover in both wireless and wired modes.
  • −Battery life is significantly shorter at up to 120 hours compared to the Ultra.
  • −1000 Hz polling rate is standard and not competitive for esports gaming.
  • −Only available in a 75% ANSI layout, no ISO options.

Keychron K3 Ultra

  • +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.
  • +Available in ANSI and multiple ISO layouts (German, UK, Nordic).
  • −Less acoustic foam layering, using only IXPE and EPDM foam.
  • −Frame uses ABS plastic with wood accents, not a full aluminum plate.
  • −Relies on newer ZMK firmware which may have a smaller community for modding compared to QMK.
  • −No N-Key Rollover information confirmed in the provided specs.

Which Keyboard Is Better for Your Needs?

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.

GamingKeychron 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.
OfficeKeychron K3 Max SE
  • •Includes a 1550 mAh battery and up to 120 hours of wireless work time.
  • •Features interior EPDM, latex, and bottom case acoustic foams for quieter typing.
  • •Uses an aluminum plate for a solid feel and comes with a wooden frame design.
ProgrammingTie
  • •Both use KSA double-shot PBT keycaps for durability and oil resistance.
  • •Both are hot-swappable and support Keychron Launcher for key remapping and macros.
  • •QMK and ZMK firmware respectively offer deep customization for complex layouts.
TravelKeychron K3 Ultra
  • •The K3 Ultra has a larger 2600 mAh battery for longer use between charges.
  • •Slim and lightweight design at 566g with a 75% compact layout.
ModdingKeychron K3 Max SE
  • •The Max SE has a more layered acoustic build with multiple foam types (EPDM, latex, bottom case).
  • •Uses an aluminum plate, offering different typing resonance compared to the Ultra's anodized aluminum.
  • •QMK firmware is widely documented with a larger community for custom firmware changes.
Content CreationKeychron K3 Max SE
  • •Sound dampening features like PET film and multiple foam layers reduce background click noise.
  • •Includes N-Key Rollover for reliable multi-key inputs during shortcuts.
  • •The wooden frame and low profile provide a premium, distraction-free aesthetic.

Frequently Asked Questions (FAQ)

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