Is anything not checked?

Lian Li doesn't publish a height limit for the A3-mATX, so that isn't checked.

Where do these numbers come from?

Lian Li's published spec; card size from Gigabyte's spec page. Checked October 2026. Makers measure differently and connectors add a few millimetres, so treat a tight result as a reason to measure.

Every card in the A3-mATX

Will it fit

Does the Gigabyte GeForce RTX 5070 Windforce OC SFF 12G fit in the Lian Li A3-mATX?

Fits

Yes. The Gigabyte GeForce RTX 5070 Windforce OC SFF 12G fits the Lian Li A3-mATX with 133 mm of length to spare.

Length282 of 415 mm133 mm spare

Height110 mmNot published

Thickness≈2.46 of 4 slots1.54 slots spare

Exact measurements

Size	Gigabyte	A3-mATX	Room
Length	282 mm	415 mm	133 mm spare
Height	110 mm	—	Not published
Thickness	≈2.46 slots	4 slots	1.54 slots spare

Lian Li's published spec

Rather have it built?

We build the RTX 5070 into small PCs by hand, each tested and shipped with its own benchmark results.

Questions

Does the Gigabyte GeForce RTX 5070 Windforce OC SFF 12G fit in the Lian Li A3-mATX?: Yes. The Gigabyte GeForce RTX 5070 Windforce OC SFF 12G fits the Lian Li A3-mATX with 133 mm of length to spare. Length 282 of 415 mm, height 110 mm (no published limit), thickness ≈2.46 of 4 slots.
Is anything not checked?: Lian Li doesn't publish a height limit for the A3-mATX, so that isn't checked.
Where do these numbers come from?: Lian Li's published spec; card size from Gigabyte's spec page. Checked October 2026. Makers measure differently and connectors add a few millimetres, so treat a tight result as a reason to measure.

Sources

Case: Lian Li’s A3-mATX specifications, checked October 24, 2026. Lian Li lists cards up to 415 mm long and 4 slots thick.
Card: Gigabyte’s spec page, checked October 23, 2026.
A 25 mm fan under the card limits it to 61 mm (3 slots); a bottom radiator with fans leaves no room for a card.

This card in other small cases

The card’s size, and all 25 cases

Other RTX 5070 cards in the A3-mATX

Check another pair with the fit checker.

Based on published dimensions, not a guarantee. Check cable, cooler and connector clearance before you buy.