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Head to head · Prices checked Oct 21, 2026

ACGAM S99 vs Skyloong GK980 Jellyfish

Get the ACGAM S99 for the 6,000 mAh battery. Get the Skyloong GK980 Jellyfish 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

Skyloong GK980 Jellyfish

  • Layout size

    96%

    98%

  • Battery

    6,000 mAh

    4,000 mAh

  • Case material

    Aluminum

    ABS

  • Switch options

    Linear

    Linear, Tactile

  • Knob

    No

    Yes

KeebFinder scores

How we score
  • ACGAM S99
  • Skyloong GK980 Jellyfish
Performance
66
67
Build quality
69
64
Productivity
80
70
Customizability
65
59
Portability
68
50

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Mount style: Gasket Mount
  • Weight: 1,200 g
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

Full specs

ACGAM S99 vs Skyloong GK980 Jellyfish specs

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

8 of 21 specs differ

ACGAM S99

Skyloong GK980 Jellyfish

Typing & switches

Switch options

Linear
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

96%
98%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
—

Battery

6,000 mAhBetter
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS

Plate material

—
Steel

Keycaps

PBT
PBT

Weight

1,200 g
1,200 g

Dimensions

46 x 143 x 386 mm
36 x 323 x 141 mm

Backlight

RGB
RGB

Firmware & software

Mac & Windows

Yes
No

Extras

Released

2024
2023

Where to buy

Compare prices

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

ACGAM S992 stores
  • AmazonGlobal

    Check price
    ~$109Visit
  • WhatGeekCN

    Out of stock
    $109Visit
  • SkyloongHK

    In stock
    $95Visit
  • AmazonGlobal

    Check price
    ~$95Visit

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.

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