Redragon CASTOR K631 HE vs DHARMA K556 HE65% vs Full-Size
Choose the CASTOR for a portable, budget-friendly 65% layout, or the DHARMA for a premium full-size build with a dedicated number pad.
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Which one should you get?
Get the
Redragon CASTOR K631 HE
65%
Build quality in the bottom 5% of 65% boards under $50.
- Compact 65% layout saves considerable desk space.
- Significantly lighter at 638 grams for easier portability.
- Includes a portable strap according to the vendor listing.
- Magnetic switches only. Standard MX switches will not fit.
- 65% layout. No function row and no numpad.
Get the
Redragon DHARMA K556 HE
Full-Size
Build quality in the bottom 50% of 100% boards under $100.
- Full-size 104-key layout includes a dedicated number pad.
- Aluminum case provides a solid, premium feel and weight.
- Includes PBT keycaps for better texture and durability.
- Magnetic switches only. Standard MX switches will not fit.
Your primary need dictates the choice. If you require a number pad for work, value a solid aluminum build, and have a fixed desk setup, the Redragon DHARMA K556 HE is the better investment. If your priority is maximizing mouse space for gaming, need a keyboard to move around, or are on a tighter budget, the Redragon CASTOR K631 HE delivers the same core gaming performance in a much more portable package.
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 DHARMA K556 HE
Layout size
65%
100%
Case material
Plastic
Aluminum
Weight
638 g
1,130 g
Heavier boards stay planted and lighter ones travel
Sound dampening
No
Yes
Released
2026
2025
- Redragon CASTOR K631 HE
- Redragon DHARMA K556 HE
- Performance
- 9193
- Build quality
- 4257
- Productivity
- 4856
- Customizability
- 4745
- Portability
- 6542
- Hall effect (magnetic)
- Rapid trigger
- Connection: Wired
- Max polling rate: 8,000 Hz
- Switch options: Magnetic
What will you mostly use it for?
The DHARMA K556 HE is the clear choice for office work, programming, and content creation due to its full-size layout with a number pad and premium materials. The CASTOR K631 HE wins for travel and portability with its lightweight 65% design. For gaming and modding, the keyboards are closely matched on core performance specs, making it a tie that comes down to personal preference for desk space versus a fuller layout.
It's a tie
- Both feature an 8000Hz polling rate for low latency.
- Both include Hall Effect magnetic switches and rapid trigger technology.
- The DHARMA lists an additional PRCS SOCD gaming engine with 4 modes.
- The CASTOR's smaller footprint frees up more desk space for mouse movement.
Redragon CASTOR K631 HE vs DHARMA K556 HE specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
5 of 18 specs differ
Redragon CASTOR K631 HE
Redragon DHARMA K556 HE
Switch options
Hall effect (magnetic)
Rapid trigger
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Connection
Max polling rate
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
Released
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Redragon CASTOR K631 HE vs DHARMA K556 HE: your questions
The vendor descriptions list both as pre-built and include spare switches and a puller, but do not explicitly state they have hot-swap sockets. They are not advertised as hot-swappable keyboards.
For pure FPS performance, they are very similar. Both offer an 8000Hz polling rate, Hall Effect switches, and rapid trigger technology for adjustable actuation. The CASTOR's smaller size can free up more desk space for low-sensitivity mouse movements.
No. Both the Redragon CASTOR K631 HE and DHARMA K556 HE are wired-only keyboards, using a detachable USB-C to USB-A cable for connection.
According to the vendor description, the PRCS SOCD technology is a gaming engine with 4 modes designed to rival Snap Tap functionality, aiming to eliminate redundant inputs for cleaner keypresses in competitive games.
Yes, both keyboards support adjustable actuation points via their software when rapid trigger is enabled. The CASTOR lists a range of 0.1-4.0mm, while the DHARMA lists 0.1-3.4mm.
The DHARMA K556 HE is more likely to be quieter. Its vendor description explicitly mentions "Quiet Dual-Layer Dampening" as a feature, while no such sound dampening is listed for the CASTOR K631 HE.
Both keyboards offer web-based driver support according to their vendor pages, which suggests basic functionality and potentially software customization may be accessible on operating systems beyond Windows via a browser.
The CASTOR includes the keyboard, keycap/switch puller, sticker, portable strap, USB-C cable, manual, and 4 spare switches. The DHARMA includes the keyboard, manual, keycap puller, USB-C cable, and 4 spare switches.
Yes. The DHARMA's aluminum case and bottom mount style typically provide a more rigid, solid typing feel with a different sound signature. The CASTOR's plastic case may have more flex and a higher-pitched acoustic profile.
Both keyboards feature RGB backlighting with 16.8 million color options according to their descriptions. The DHARMA's PBT keycaps may diffuse light differently than the unspecified keycaps on the CASTOR.
Yes, you can replace the keycaps as both include a keycap puller. However, the DHARMA's vendor description notes its Hall Effect switches are incompatible with other brands' HE switches, but this does not necessarily affect standard keycap compatibility.
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