Exact GPU / case compatibility

Does AMD Radeon RX 7900 XTX Reference fit in Lian Li A3-mATX?

Likely fits. Likely fits in the default no-front-radiator check. Length margin 128mm, side/cable margin 14mm and thickness margin 7mm.

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	415mm case limit	287mm GPU	PASS · 128mm	Manufacturer verified
Height + power cable	165mm case envelope	151mm (123+28)	PASS · 14mm	FitMyPC estimate
GPU thickness	70mm case envelope	63mm GPU	PASS · 7mm	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.

AMD Radeon RX 7900 XTX Reference manufacturer data

Dimensions stored by FitMyPC: 287 × 123 × 63mm. Power connector: 2 x 8-pin PCIe.

Manufacturer source checked

Verified fields: length, connector, slotWidth

AMD publishes 287mm length, 2.5-slot design and two 8-pin power connectors. Height/thickness remain non-manufacturer values in FitMyPC because AMD's table does not publish exact millimetres for those fields.

Official manufacturer source ↗

Checked 2026-08-29

Lian Li A3-mATX manufacturer data

GPU length limit stored by FitMyPC: 415mm. Side-panel and thickness envelopes are displayed separately because manufacturers do not publish these consistently.

Manufacturer source checked

Verified fields: maxGpuLength, manufacturerGpuSlots

Lian Li specifies up to 415mm GPU length and support for up to a 4-slot GPU, subject to PSU/fan/radiator layout.

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.