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Compare Redragon FIZZ K617 vs K721 Differences Side by Side

This comparison is for buyers deciding between Redragon's most compact offering and their performance-focused model. The choice hinges on whether you prioritize saving desk space and money or demand the latest gaming technologies like adjustable magnetic switches and a high polling rate. Both are wired, hot-swappable, and feature RGB, making the layout and feature set the core differentiators.

FIZZ K617 60% Wired Mechanical Keyboard (Red Inner)
60
Redragon K721 Wired Mechanical Keyboard Magnetic Switches

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  • Released in 2021
  • Has Linear, Clicky switch options
  • Available in a 60% layout
  • Built with the ANSI, ISO-DE, ISO-ES, ISO-FR, ISO-IT, ISO layout standard
  • Connects via USB-C
  • Uses a Bottom Mount mounting style
  • Weighs about 590 g
  • Sized at 38 x 99 x 36 mm
  • Made with a Plastic case
  • Released in 2025
  • Has Linear, Magnetic switch options
  • Available in a 75% layout
  • Built with the ANSI layout standard
  • Utilizes Hall effect sensors
  • Enables rapid trigger functionality
  • Uses a Gasket Mount mounting style
  • Runs at a 8000 Hz polling rate
  • Weighs about 803 g
  • Sized at 43 x 335 x 140 mm
Scores
  • Performance: 70
  • Build Quality: 54.9
  • Productivity: 52.3
  • Customizability: 56.3
  • Portability: 69.7
Scores
  • Performance: 97.8
  • Build Quality: 58.1
  • Productivity: 51.3
  • Customizability: 54.3
  • Portability: 58
Name
Redragon FIZZ K617
Name
Redragon K721
Release year
2021
Release year
2025
Switch Options
Linear, Clicky
Switch Options
Linear, Magnetic
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
60%
Layout Size
75%
Layout Standard
ANSI, ISO-DE, ISO-ES, ISO-FR, ISO-IT, ISO
Layout Standard
ANSI
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
Wired, Wired only
Connection
Wired, Wired only
Polling Rate
-
Polling Rate
8000 Hz
Battery capacity
-
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
Bottom Mount
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Rgb
Case Colors
Case Colors
Case Material
Plastic
Case Material
-
Keycaps Material
-
Keycaps Material
-
Dimensions
38 x 99 x 36 mm
Dimensions
43 x 335 x 140 mm
Weight
590g
Weight
803g
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Pros and Trade-offs

Your primary need dictates the choice. If your budget is strict and desk space is minimal, the Redragon FIZZ K617 delivers core hot-swap functionality in a tiny package. If you are a serious gamer or need a more versatile layout for work, the Redragon K721 justifies its higher cost with magnetic switches, a high polling rate, and a more practical 75% form factor.

Redragon FIZZ K617

  • +Extremely compact 60% layout saves substantial desk space.
  • +Lower cost, making it a very budget-friendly entry point.
  • +Hot-swappable socket compatible with both 3-pin and 5-pin switches.
  • +Includes a detachable USB Type-C cable.
  • +Software is available for creating custom macros and lighting effects.
  • −60% layout lacks dedicated arrow keys, function row, and navigation cluster.
  • −Uses a standard bottom mount, which may offer less typing flex than a gasket mount.
  • −Limited to linear or clicky mechanical switches, not the latest magnetic technology.

Redragon K721

  • +Features Hall effect magnetic switches with adjustable actuation points (0.01mm to 3.5mm).
  • +High 8000Hz polling rate for minimal input latency.
  • +Includes Rapid Trigger mode for competitive gaming.
  • +75% layout retains arrow keys and essential navigation keys in a relatively compact form.
  • +Uses a gasket-mounted design for improved typing comfort and sound.
  • −Larger and heavier than the 60% K617, reducing portability.
  • −Higher price point.
  • −Wired-only connectivity limits placement flexibility.

Which Keyboard Is Better for Your Needs?

The K721 is the clear choice for gaming, office work, and programming due to its more functional layout and advanced gaming features. The FIZZ K617 wins for travel and portability thanks to its diminutive 60% size and lighter weight. For modding, both offer hot-swap capability, making them equally viable starting points for customization.

GamingRedragon K721
  • •The K721 lists an 8000Hz polling rate for faster response.
  • •It features Hall effect magnetic switches with adjustable actuation points.
  • •It includes a dedicated Rapid Trigger mode for repeated keystrokes.
OfficeRedragon K721
  • •The K721's 75% layout retains arrow keys and some function keys, which are missing on the 60% K617.
  • •Its gasket-mounted design is described as enhancing typing comfort during extended sessions.
  • •The adjustable actuation on its switches may allow for quieter, lighter typing.
ProgrammingRedragon K721
  • •The 75% layout provides dedicated arrow keys and navigation cluster, crucial for coding.
  • •The adjustable magnetic switches can be fine-tuned for preferred typing feel.
  • •The larger form factor offers more key accessibility without relying on layers.
TravelRedragon FIZZ K617
  • •The K617 is a 60% layout, significantly smaller (99mm wide) than the K721 (335mm wide).
  • •It is lighter at 590g compared to the K721's 803g.
  • •Its compact size is designed for space-saving and portability.
ModdingTie
  • •Both keyboards feature hot-swappable sockets.
  • •The K617 is listed as compatible with 3-pin and 5-pin switches.
  • •The K721 uses hot-swappable Hall effect magnetic switches, offering a different modding path.
Content CreationRedragon K721
  • •The 75% layout offers more readily available keys for shortcut commands.
  • •Software for macro customization is mentioned for the K617, but the K721's extra keys provide more physical options.
  • •The gasket mount may provide a more comfortable typing experience for long editing sessions.

Frequently Asked Questions (FAQ)

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