Redragon CASTOR K631 Pro vs FIZZ K617
Choose the CASTOR K631 Pro for tri-mode wireless, a detachable strap and dedicated arrow keys, or the FIZZ K617 for its LED screen, 1000 Hz polling rate and multiple listed layout variants.
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Which one should you get?
Get the
Redragon CASTOR K631 Pro
Build quality in the bottom 30% of 65% boards under $50.
- Tri-mode connection with Bluetooth, 2.4 GHz and USB-C wired options.
- Dedicated arrow keys in a 65% layout, plus a detachable portable strap.
- 1600mAh battery for wireless use.
- No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
- 65% layout. No function row and no numpad.
Get the
Redragon FIZZ K617
Build quality in the top 45% of 60% boards under $50.
- A listed 1000 Hz polling rate and an LED screen.
- The listing includes ISO-UK, ISO-DE and other named layout variants.
- Redragon lists both linear and clicky switch types.
- Compact layout only. No function row, dedicated arrow keys, or numpad.
Get the CASTOR K631 Pro for Bluetooth and 2.4 GHz wireless, its dedicated arrow keys and detachable strap, features the FIZZ K617 does not list. Choose the FIZZ K617 for its 1000 Hz polling rate, LED screen and listed ISO layout variants, which the CASTOR K631 Pro does not offer. Neither is a fit if you require a function row or numpad, and the FIZZ K617 also omits dedicated arrow keys.
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
Display
None
LED
A case display rather than a typing feature
Weight
470 g
590 g
Heavier boards stay planted and lighter ones travel
- Redragon CASTOR K631 Pro
- Redragon FIZZ K617
- Performance
- 7171
- Build quality
- 5661
- Productivity
- 5453
- Customizability
- 5867
- Portability
- 8470
- Hot-swappable
- Case material: Plastic
- Mount style: Bottom Mount
What will you mostly use it for?
The CASTOR K631 Pro is the more flexible fit for wireless desk use, travel and workflows that benefit from dedicated arrow keys. The FIZZ K617 has a clearer gaming-specific spec in its stated polling rate and its compact layout is described for FPS play. Modding is a close match because both boards are hot-swappable, with switch-pin compatibility described for each. For content creation, both listings mention software macros, while their extra features differ without establishing a decisive advantage.
Pick the Redragon FIZZ K617
- The FIZZ K617 lists a 1000 Hz polling rate.
- Redragon describes its 60% layout as suited to FPS gaming and mouse space-saving.
- The CASTOR K631 Pro instead offers tri-mode connectivity, including wireless options, for players who want to avoid a wired-only setup.
Redragon CASTOR K631 Pro vs FIZZ K617 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
8 of 18 specs differ
Redragon CASTOR K631 Pro
Redragon FIZZ K617
Switch options
Hot-swappable
Mount style
Layout size
Layout standard
Ergonomics
Display
Connection
Max polling rate
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
N-key rollover
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
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Lowest price across stores, Amazon excluded.
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
Redragon CASTOR K631 Pro
No ISO layout at the stores we track.
Redragon FIZZ K617
- Go to Redragon
Redragon
ISO-UK, ISO-FR
In stockShips to you
Redragon CASTOR K631 Pro vs FIZZ K617: your questions
Yes. Its listed connection modes are Bluetooth, 2.4 GHz and wired USB-C, and its battery is listed as 1600mAh.
No. The FIZZ K617 is listed as wired-only and uses a USB-C connection.
The CASTOR K631 Pro is a 65% keyboard, while the FIZZ K617 is a 60% keyboard. The FIZZ K617 has the more compact layout, but its layout also omits dedicated arrow keys.
Yes, its listing specifies a 1000 Hz polling rate. The CASTOR K631 Pro's metadata does not list a polling rate.
Yes. Redragon lists dedicated arrow keys among the CASTOR K631 Pro's features. The FIZZ K617's compact layout is listed as having no dedicated arrow keys.
The FIZZ K617 listing includes ISO-UK, ISO-DE, ISO-ES, ISO-FR, ISO-IT, ISO and JIS variants. Check the specific variant offered by the seller before ordering.
No. Its compatibility notes say ISO variants, including ISO-DE and UK, are not offered. The FIZZ K617 listing includes ISO-DE and ISO-UK variants.
Yes, both keyboards are listed as hot-swappable. Redragon specifies 3-pin and 5-pin switch compatibility for both models.
The FIZZ K617 is listed with an LED screen. The CASTOR K631 Pro is listed without a screen, and the FIZZ product description does not specify what the screen displays.
Redragon describes software macros for both keyboards, including different keybindings or shortcuts. The CASTOR K631 Pro listing also describes software for designing lighting modes and effects.
The CASTOR K631 Pro is listed at 470g, while the FIZZ K617 is listed at 590g. The CASTOR also has a detachable portable strap mentioned in its vendor description.
Neither listed layout has a function row or numpad. The CASTOR K631 Pro has a 65% layout, while the FIZZ K617's compact layout also lacks dedicated arrow keys.
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