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Head to head · Prices checked Nov 2, 2026

Corsair K70 Core vs Yunzii C21

Get the Corsair K70 Core for knob. Get the Yunzii C21 for hot-swappable.

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Quick verdict

Which one should you get?

Get the

Corsair K70 Core

Knob

Build quality in the bottom 10% of 100% boards under $150.

Rules this board out

  • Switches are soldered. Swapping them means soldering.

Get the

Yunzii C21

Hot-swappable

Build quality in the bottom 50% of Numpad boards under $100.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
  • Numpad only. This is not a full keyboard.

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.

Corsair K70 Core

Yunzii C21

  • Layout size

    100%

    Numpad

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

    Wireless for several devices and wired for lower latency

  • Hot-swappable

    No

    Yes

    Switch changes without soldering

  • Knob

    Yes

    No

  • Display

    None

    TFT

    A case display rather than a typing feature

KeebFinder scores

How we score
  • Corsair K70 Core
  • Yunzii C21
Performance
54
70
Build quality
43
63
Productivity
58
58
Customizability
55
66
Portability
58
88

What they share

  • Switch options: Linear
See every spec side by side

Full specs

Corsair K70 Core vs Yunzii C21 specs

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

15 of 22 specs differ

Corsair K70 Core

Yunzii C21

Typing & switches

Switch options

Linear
Linear

Hot-swappable

No
Yes

Mount style

—
Gasket Mount

Sound dampening

Yes
No

Layout

Layout size

100%
Numpad

Layout standard

ANSI
—

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
TFT

Media keys

Yes
No

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

—
1,000 Hz

Battery

Wired only
2,500 mAh

USB-C

No
Yes

Build & materials

Case material

ABS, Aluminum
—

Keycaps

ABS
PBT

Weight

920 g
250 g

Dimensions

40 x 135 x 448 mm
39 x 153 x 98 mm

Backlight

RGB
RGB, south-facing

Firmware & software

N-key rollover

No
Yes

Mac & Windows

No
Yes

Extras

Released

2023
2026

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.

Yunzii C212 stores

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