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Compare Redragon EISA K686 HE vs PENUMBRA K687 HE Differences Side by Side

This comparison is for buyers deciding between two feature-rich, wired Hall Effect keyboards from Redragon. The choice is difficult because both share core technologies like Rapid Trigger, magnetic switches, and sound dampening, but diverge sharply in layout, build materials, and a key performance spec. The EISA K686 offers a 98% layout and a specified 8000 Hz polling rate, while the PENUMBRA K687 provides a more compact 75% layout housed in a CNC aluminum frame.

62
EISA K686 HE Rapid Trigger Gaming Keyboard
70
PENUMBRA K687 HE Rapid Trigger Gaming Keyboard

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  • Available in a 90% layout
  • Features N-key rollover
  • Runs at a 8000 Hz polling rate
  • Weighs about 1200 g
  • Sized at 90 x 430 x 190 mm
  • Made with a Plastic case
  • Available in a 75% layout
  • Compatible with both Mac and Windows
  • Weighs about 1500 g
  • Sized at 43 x 334 x 140 mm
  • Made with a Aluminum case
Scores
  • Performance: 97.6
  • Build Quality: 57.1
  • Productivity: 62.6
  • Customizability: 48.6
  • Portability: 41.5
Scores
  • Performance: 86.7
  • Build Quality: 69.8
  • Productivity: 78.2
  • Customizability: 55.7
  • Portability: 60.7
Name
Redragon EISA K686 HE
Name
Redragon PENUMBRA K687 HE
Release year
2025
Release year
2025
Switch Options
Magnetic
Switch Options
Magnetic
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
90%
Layout Size
75%
Layout Standard
ANSI
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
8000 Hz
Polling Rate
-
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
Gasket 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
Aluminum
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
90 x 430 x 190 mm
Dimensions
43 x 334 x 140 mm
Weight
1200g
Weight
1500g
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Pros and Trade-offs

Your primary need dictates the choice. If competitive gaming latency and a numpad are critical, the EISA K686 HE is the clear pick. If you prioritize a compact, sturdy build with a premium aluminum case and are willing to forgo the numpad and a specified ultra-high polling rate, the PENUMBRA K687 HE is the better option. Both are capable wired boards with advanced Hall Effect and Rapid Trigger features.

Redragon EISA K686 HE

  • +Specified 8000 Hz polling rate for high-speed input.
  • +98% layout includes a numpad while saving space compared to a full-size board.
  • +Includes PRCS technology with Snap Tap and SOCD functions for gaming.
  • +Height-adjustable feet for ergonomic positioning.
  • +Comes with a keycap puller, switch puller, and four spare switches.
  • −Plastic case construction, compared to the aluminum on the PENUMBRA.
  • −Larger footprint (430mm long) is less desk-space efficient.
  • −Switches are not hot-swappable and are listed as Redragon-exclusive, not cross-compatible.

Redragon PENUMBRA K687 HE

  • +CNC aluminum frame with a frosted finish for a premium, solid build.
  • +Compact 75% layout (334mm long) saves considerable desk space.
  • +Top function keys are directly accessible without an FN combo, according to the manufacturer.
  • +Includes five-layer noise dampening with PO foam, IXPE foam, PET pad, and silicone.
  • +Comes with a keycap puller, switch puller, and four spare switches.
  • −Polling rate is not specified in the provided product information.
  • −No height-adjustable feet, as listed in its specifications.
  • −Switches are not hot-swappable and are listed as Redragon-exclusive, not cross-compatible.

Which Keyboard Is Better for Your Needs?

The EISA K686 is the stronger choice for gaming due to its 8K polling rate and for office work due to its numpad. The PENUMBRA K687 wins for travel thanks to its compact 75% size. For programming, the decision is a tie between the EISA's full navigation cluster and the PENUMBRA's direct-access function row. Both keyboards are equally limited for modding due to their non-hot-swappable, proprietary switches, and both are capable for content creation, with the EISA having a slight edge with its numpad.

GamingRedragon EISA K686 HE
  • •The EISA K686 has a specified 8000 Hz polling rate, which the PENUMBRA's listing does not mention.
  • •Both keyboards feature Hall Effect magnetic switches with adjustable Rapid Trigger technology.
  • •The EISA K686 includes PRCS tech with Snap Tap and SOCD functions, as noted in its vendor description.
OfficeRedragon EISA K686 HE
  • •The EISA K686's 98% layout includes a numpad, which is useful for data entry.
  • •Both have a multi-function control knob for media and volume adjustments.
  • •The EISA K686 is listed as having height-adjustable feet, while the PENUMBRA K687 is not.
ProgrammingTie
  • •The EISA K686 offers dedicated arrow and navigation keys in a compact 98% form.
  • •The PENUMBRA K687's 75% layout includes top function keys without needing an FN combo, according to its description.
  • •Both use PBT keycaps and have a gasket mount design for a potentially comfortable typing feel.
TravelRedragon PENUMBRA K687 HE
  • •The PENUMBRA K687 is significantly smaller (334mm long) and uses a 75% layout.
  • •The EISA K686 is larger (430mm long) with a 90% layout.
  • •Both are wired-only and have similar weights, but the PENUMBRA's smaller footprint is more portable.
ModdingTie
  • •Both keyboards are listed as pre-built and are not hot-swappable, with Redragon stating their switches are not cross-compatible.
  • •Both include a keycap and switch puller and four spare switches in the box.
  • •Both feature a gasket mount design and five-layer noise dampening with foams and pads.
Content CreationRedragon EISA K686 HE
  • •The EISA K686's 98% layout provides a numpad for shortcut macros or numerical input.
  • •Both keyboards include a dedicated control knob for adjusting media and backlight settings.
  • •The EISA K686's vendor page mentions web-based driver support for cross-platform software features.

Frequently Asked Questions (FAQ)

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