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Head to head · Prices checked Nov 10, 2026

KBDFans GT 80 MX vs Keychron J4

Get the KBDFans GT 80 MX for the 8,000 Hz polling rate. Get the Keychron J4 for qmk.

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Quick verdict

Which one should you get?

Get the

KBDFans GT 80 MX

polling rate

Build quality in the top 15% of 80% boards under $200.

Get the

Keychron J4

QMK

Build quality in the top 30% of 80% boards under $100.

Rules this board out

  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.

What actually differs

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.

KBDFans GT 80 MX

Keychron J4

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Max polling rate

    8,000 Hz

    1,000 Hz

    Higher polling helps competitive FPS and does nothing for typing

  • Case material

    Aluminum

    ABS

  • Display

    LED

    None

    A case display rather than a typing feature

  • QMK

    No

    Yes

    The deep option when you want to remap every key

KeebFinder scores

How we score
  • KBDFans GT 80 MX
  • Keychron J4
Performance
75
82
Build quality
79
71
Productivity
66
89
Customizability
76
89
Portability
53
73

What they share

  • Layout size: 80%
  • Hot-swappable
  • VIA
  • Sound dampening
See every spec side by side

Full specs

KBDFans GT 80 MX vs Keychron J4 specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

11 of 25 specs differ

KBDFans GT 80 MX

Keychron J4

Typing & switches

Switch options

—
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

PCB Mount
—

Sound dampening

Yes
Yes

Layout

Layout size

80%
80%

Layout standard

—
ANSI

Ergonomics

Standard
Standard

Display

LED
None

Media keys

No
Yes

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

8,000 HzBetter
1,000 Hz

Battery

Wired only
4,000 mAh

USB-C

No
Yes

Build & materials

Case material

Aluminum
ABS

Plate material

Aluminum, FR4, Polycarbonate
Steel

Keycaps

—
PBT

Weight

—
870 g

Dimensions

—
38 x 366 x 138 mm

Typing angle

—
10°

Backlight

None
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

Yes
Yes

N-key rollover

No
Yes

Mac & Windows

No
Yes

Extras

Released

2025
2025

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Lowest price across stores, Amazon excluded.

Keychron J43 stores

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