Redragon CASTOR K631 HE vs FIZZ K617Gaming Tech vs Modding
Choose the CASTOR K631 HE for cutting-edge gaming performance, or the FIZZ K617 for easy switch customization on a tighter budget.
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Which one should you get?
Get the
Redragon CASTOR K631 HE
Gaming Tech
Build quality in the bottom 5% of 65% boards under $50.
- Features Hall Effect magnetic switches with a claimed longer lifespan.
- Includes Rapid Trigger technology for adjustable actuation points.
- Offers a high 8000 Hz polling rate for reduced input latency.
- Magnetic switches only. Standard MX switches will not fit.
- 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
Modding
Build quality in the top 50% of 60% boards under $50.
- Hot-swappable sockets support both 3-pin and 5-pin mechanical switches.
- More compact 60% layout saves desk space.
- Slightly lighter weight at 590g.
- Compact layout only. No function row, dedicated arrow keys, or numpad.
Your primary need dictates the choice. If your goal is to gain every possible advantage in competitive titles like Valorant or Apex Legends, the Redragon CASTOR K631 HE's Hall Effect switches and 8K polling are compelling, despite less flexibility for physical mods. If you want a compact keyboard to save space and enjoy experimenting with different switch types without soldering, the hot-swappable Redragon FIZZ K617 is the more practical and budget-friendly option.
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 HE
Redragon FIZZ K617
Layout size
65%
60%
Hall effect (magnetic)
Yes
No
Adjustable actuation helps in games and not in normal typing
Rapid trigger
Yes
No
Faster resets help in games and not in normal typing
Hot-swappable
No
Yes
Switch changes without soldering
Max polling rate
8,000 Hz
1,000 Hz
Higher polling helps competitive FPS and does nothing for typing
- Redragon CASTOR K631 HE
- Redragon FIZZ K617
- Performance
- 9170
- Build quality
- 4261
- Productivity
- 4853
- Customizability
- 4767
- Portability
- 6570
- Connection: Wired
- Case material: Plastic
What will you mostly use it for?
The CASTOR K631 HE is the clear choice for serious gamers who want the advantages of Hall Effect technology and ultra-high polling rates. For typists and programmers, its arrow keys give it an edge over the more compact FIZZ K617. However, the FIZZ K617 wins for portability due to its smaller 60% size and is the definitive pick for modders thanks to its hot-swap sockets. For general office use or content creation, the trade-offs are more balanced, making either a viable option depending on layout preference.
Pick the Redragon CASTOR K631 HE
- Features Hall Effect magnetic switches with adjustable actuation points via software.
- Includes Rapid Trigger technology for dynamic activation and deactivation.
- Offers a native 8000 Hz polling rate for lower latency input.
Redragon CASTOR K631 HE vs FIZZ K617 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
12 of 18 specs differ
Redragon CASTOR K631 HE
Redragon FIZZ K617
Switch options
Hall effect (magnetic)
Rapid trigger
Hot-swappable
Mount style
Layout size
Layout standard
Ergonomics
Display
Connection
Max polling rate
USB-C
Case material
Weight
Dimensions
Backlight
N-key rollover
Released
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
Redragon CASTOR K631 HE
No ISO layout at the stores we track.
Redragon FIZZ K617
Redragon
ISO-UK
In stockShips to you
Redragon
ISO-FR
In stockShips to you
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
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Lowest price across stores, Amazon excluded.
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Redragon CASTOR K631 HE vs FIZZ K617: your questions
The Redragon CASTOR K631 HE is designed for FPS gaming. It features Hall Effect magnetic switches and Rapid Trigger technology, which allows for adjustable actuation points. It also has an 8000 Hz polling rate for very fast response times.
The CASTOR K631 HE comes with Hall Effect magnetic switches and includes four spare switches. The product listing does not mention hot-swappable sockets, suggesting switch replacement may not be as straightforward as on a standard hot-swap board.
Yes, the Redragon FIZZ K617 is explicitly listed as having hot-swappable sockets. The manufacturer states these sockets are compatible with both 3-pin and 5-pin mechanical switches for easy customization.
The Redragon FIZZ K617 is more portable. It has a smaller 60% layout and weighs 590g, compared to the 65% layout and 638g weight of the CASTOR K631 HE. Both have detachable USB-C cables for easier transport.
Only the Redragon CASTOR K631 HE has dedicated arrow keys due to its 65% layout. The Redragon FIZZ K617 uses a 60% layout, which does not include dedicated arrow keys, requiring the use of a function layer.
The polling rate for the Redragon FIZZ K617 is not specified in the provided specifications or vendor description. The CASTOR K631 HE, in contrast, has a confirmed 8000 Hz polling rate.
According to the vendor description, the Redragon FIZZ K617 comes with linear red switches. The listing describes them as quiet with a soft key travel, suitable for both gaming and office environments.
The CASTOR K631 HE package includes the keyboard, a keycap and switch puller, a Redragon sticker, a portable strap, a USB Type-C cable, a user manual, and four spare switches.
Based on the vendor description, the Redragon FIZZ K617 may be quieter as it specifically mentions coming with quiet linear red switches. The sound profile of the CASTOR K631 HE's Hall Effect switches is not detailed.
The vendor description for the CASTOR K631 HE mentions dual platform driver support, including a new web-based driver that allows users on other operating systems to access software features via a browser. This suggests broader compatibility beyond just Windows.
Rapid Trigger is a feature that, when combined with the Hall Effect switch, allows the actuation point to be precisely adjusted via software. It enables dynamic activation and deactivation of a key, which is beneficial for fast, repetitive keypresses in games.
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