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Head to head · Prices checked Oct 21, 2026

ACGAM S99 vs Keychron V5 Max

Get the ACGAM S99 for the 6,000 mAh battery. Get the Keychron V5 Max for 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

Keychron V5 Max

  • Battery

    6,000 mAh

    4,000 mAh

  • Case material

    Aluminum

    ABS, Plastic

  • Switch options

    Linear

    Clicky, Linear, Tactile

  • Mount style

    Gasket Mount

    Gasket Mount, Plate Mount

  • Knob

    No

    Yes

KeebFinder scores

How we score
  • ACGAM S99
  • Keychron V5 Max
Performance
66
83
Build quality
69
86
Productivity
80
97
Customizability
65
98
Portability
68
53

What they share

  • Layout size: 96%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Max polling rate: 1,000 Hz
  • Sound dampening
See every spec side by side

From real owners

What owners say

Ratings and quotes collected from verified store reviews, including the critical ones.

ACGAM S99

No owner reviews collected yet.

Keychron V5 Max

4.8

5 owner reviews

Praise
“The keys feel smooth and easy as you type. It's probably the best keyboard I've used. I've had a number of mechanical keyboards, but, none of them can compare to the v5 max. The feel of the thing while typing, is hard to not constantly repeat.”
Chris L.Verified buyer· via Keychron

Full specs

ACGAM S99 vs Keychron V5 Max specs

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

16 of 27 specs differ

ACGAM S99

Keychron V5 Max

Typing & switches

Switch options

Linear
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount, Plate Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

No
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

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 mAhBetter
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS, Plastic

Plate material

—
Polycarbonate

Keycaps

PBT
ABS, PBT

Weight

1,200 g
925 g

Dimensions

46 x 143 x 386 mm
22 x 149 x 392 mm

Typing angle

—
4°

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
2023

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
  • KeychronHK

    In stock
    $99Visit
  • MKUS

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    Visit
  • Keychron (DE)DE

    Out of stock
    $111Visit

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