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Head to head · Prices checked Oct 21, 2026

ACGAM S99 vs Yunzii B98 PRO

Get the Yunzii B98 PRO for the 8,000 mAh battery and knob.

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.

ACGAM S99

Yunzii B98 PRO

  • Battery

    6,000 mAh

    8,000 mAh

  • Case material

    Aluminum

    Metal, Plastic

  • Knob

    No

    Yes

  • Display

    None

    OLED, LED

  • Weight

    1,200 g

    1,188 g

KeebFinder scores

How we score
  • ACGAM S99
  • Yunzii B98 PRO
Performance
66
84
Build quality
69
82
Productivity
80
93
Customizability
65
94
Portability
68
62

What they share

  • Layout size: 96%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Max polling rate: 1,000 Hz
  • Switch options: Linear
  • Mount style: Gasket Mount
See every spec side by side

Full specs

ACGAM S99 vs Yunzii B98 PRO specs

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

13 of 25 specs differ

ACGAM S99

Yunzii B98 PRO

Typing & switches

Switch options

Linear
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-FR

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
OLED, LED

Media keys

No
Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz
1,000 Hz

Battery

6,000 mAh
8,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Metal, Plastic

Plate material

—
Aluminum

Keycaps

PBT
PBT

Weight

1,200 g
1,188 g

Dimensions

46 x 143 x 386 mm
49 x 414 x 142 mm

Backlight

RGB
RGB, south-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2024
2026

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

ACGAM S992 stores
  • AmazonGlobal

    Check price
    ~$109Visit
  • WhatGeekCN

    Out of stock
    $109Visit
  • YunziiCN

    In stock
    $91Visit
  • AmazonGlobal

    Check price
    Visit

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