Exact GPU / case compatibility

Does NVIDIA GeForce RTX 4090 Founders Edition fit in Antec C8?

Likely fits. Likely fits in the default no-front-radiator check. Length margin 136mm, side/cable margin 27mm and thickness margin 29mm.

This page checks the exact GPU against the selected case with no front radiator installed. Use the interactive calculator to add your cooling hardware.

Open this exact build in FitMyPC GPU details Case details

Compatibility calculation

Check	Available	Required	Result	Data confidence
GPU length	440mm case limit	304mm GPU	PASS · 136mm	Manufacturer verified
Height + power cable	200mm case envelope	173mm (137+36)	PASS · 27mm	FitMyPC estimate
GPU thickness	90mm case envelope	61mm GPU	PASS · 29mm	FitMyPC estimate

Some case clearance fields used by this result are estimates, so treat a pass as a likely fit rather than a manufacturer guarantee. A front radiator can reduce available GPU length and change this answer.

NVIDIA GeForce RTX 4090 Founders Edition manufacturer data

Dimensions stored by FitMyPC: 304 × 137 × 61mm. Power connector: 12VHPWR.

Manufacturer source checked

Verified fields: length, height, thickness, connector, cableAllowance

NVIDIA specifies a 304×137×61mm case-clearance envelope and recommends 36mm additional cable space.

Official manufacturer source ↗

Checked 2026-08-29

Antec C8 manufacturer data

GPU length limit stored by FitMyPC: 440mm. Side-panel and thickness envelopes are displayed separately because manufacturers do not publish these consistently.

Manufacturer source checked

Verified fields: maxGpuLength, radiatorSupport.top, radiatorSupport.side

Antec specifies up to 440mm GPU length and up to 360mm radiators at top and side.

Official manufacturer source ↗

Checked 2026-08-29

What can change the result?

Front radiator/fan thickness, vertical mounting, drive cages, brackets, connector orientation, motherboard layout and product revisions can affect real-world fit.