Redragon CASTOR K631 Pro vs FIZZ K617Wireless vs Wired 60%
Choose the CASTOR K631 Pro for wireless flexibility and a 65% layout, or the FIZZ K617 for a more affordable, strictly wired 60% form factor.
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Which one should you get?
Get the
Redragon CASTOR K631 Pro
Wireless
- Tri-mode connectivity (USB-C wired, Bluetooth, 2.4GHz) for versatile use.
- 65% layout includes dedicated arrow keys and a few extra navigation keys.
- Includes a 1600mAh rechargeable battery for wireless operation.
- Larger and heavier than a true 60% keyboard, reducing portability.
- Battery-dependent for wireless modes, requiring periodic charging.
- ABS keycaps may develop shine over time with heavy use.
Get the
Redragon FIZZ K617
Wired 60%
- More compact 60% layout maximizes desk space.
- Wired-only design ensures consistent latency and no battery management.
- Potentially more affordable, as indicated by its lower starting price range.
- Lacks wireless connectivity, limiting placement options.
- 60% layout requires using function layers for arrow keys and navigation.
- Package does not include a switch puller, only a keyboard, cable, and manual.
Your primary need dictates the choice. If you want to cut the cord and value dedicated arrow keys, the Redragon CASTOR K631 Pro is the clear option. If your priority is the smallest footprint for a tight budget or travel bag, and you don't mind a cable, the Redragon FIZZ K617 is a capable, no-frills alternative. Both serve as solid entry points into hot-swappable mechanical keyboards.
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.
Redragon CASTOR K631 Pro
Redragon FIZZ K617
Layout size
65%
60%
Connection
Bluetooth, 2.4 GHz, Wired
Wired
Wireless for several devices and wired for lower latency
Switch options
Linear
Clicky, Linear
Weight
470 g
590 g
Heavier boards stay planted and lighter ones travel
Layout standard
ANSI
ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, ISO-IT
ISO and JIS exist so regional layouts fit
- Redragon CASTOR K631 Pro
- Redragon FIZZ K617
- Performance
- 7271
- Build quality
- 5756
- Productivity
- 5454
- Customizability
- 5857
- Portability
- 8470
- Hot-swappable
- Case material: Plastic
- Mount style: Bottom Mount
What will you mostly use it for?
The CASTOR K631 Pro wins in most scenarios requiring a balance of functionality and cable-free use, such as office work, programming, and gaming. Its wireless options and 65% layout with arrow keys provide tangible benefits. The FIZZ K617 is the more focused choice for travel due to its smaller 60% size, and it can be a more affordable entry point. For modding, both are equally capable with their hot-swap sockets.
Pick the Redragon CASTOR K631 Pro
- The CASTOR K631 Pro offers tri-mode connectivity (wired, Bluetooth, 2.4GHz) for reduced cable clutter.
- Its 65% layout retains dedicated arrow keys, which some gamers prefer for in-game menus or controls.
- The vendor description states it is 'dedicated for FPS Gamer' and includes a detachable strap for portability between setups.
Redragon CASTOR K631 Pro vs FIZZ K617 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
7 of 17 specs differ
Redragon CASTOR K631 Pro
Redragon FIZZ K617
Switch options
Hot-swappable
Mount style
Layout size
Layout standard
Ergonomics
Display
Connection
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
N-key rollover
Released
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Redragon CASTOR K631 Pro vs FIZZ K617: your questions
The core difference is connectivity and layout. The CASTOR K631 Pro is a 65% keyboard with tri-mode wireless (Bluetooth, 2.4GHz, wired) and dedicated arrow keys. The FIZZ K617 is a wired-only 60% keyboard that requires a function layer for arrow keys.
Yes. Both keyboards feature hot-swappable sockets. The manufacturer states the CASTOR K631 Pro has a 'free-mod hot swappable' PCB, and the FIZZ K617 socket is compatible with both 3-pin and 5-pin switches.
Yes. The Redragon CASTOR K631 Pro includes a built-in 1600mAh rechargeable battery to power its Bluetooth and 2.4GHz wireless modes.
The FIZZ K617 is more portable due to its smaller 60% dimensions (38 x 99 x 36 mm). The CASTOR K631 Pro is a 65% layout and is slightly lighter (470g vs 590g) but has a larger footprint.
No. The Redragon FIZZ K617 is a wired-only mechanical keyboard. It connects via a detachable USB Type-C cable and does not have Bluetooth or a 2.4GHz receiver.
Yes. According to their vendor pages, both the CASTOR K631 Pro and FIZZ K617 support Redragon's pro software. This software allows for customizing RGB lighting effects and creating macros.
The Redragon CASTOR K631 Pro uses ABS keycaps with an OEM profile, as listed in its specifications.
The vendor description for the specific FIZZ K617 model lists it with linear red switches. The metadata also indicates the K617 model line offers linear or clicky switch types.
The CASTOR K631 Pro is generally better for programming. Its 65% layout provides dedicated arrow keys, which are frequently used in code editing, without requiring a function layer like on the 60% FIZZ K617.
The CASTOR K631 Pro package includes the keyboard, a user manual, a keycap and switch puller, a USB-A to USB-C cable, and a Redragon sticker.
Yes. The FIZZ K617 features RGB backlighting with up to 20 preset modes, and brightness and speed are adjustable directly on the keyboard.
Based on the listed price ranges, the FIZZ K617 generally starts at a lower price point. The CASTOR K631 Pro, with its additional wireless functionality and larger layout, is typically priced higher.
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