Where do these numbers come from?

SilverStone's published spec; card size from NVIDIA'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 SG13

Will it fit

Does the NVIDIA GeForce RTX 5090 Founders Edition fit in the SilverStone SG13?

Doesn’t fit

No. The NVIDIA GeForce RTX 5090 Founders Edition is 34 mm too long and 8 mm too tall and no thickness to spare (2 of 2 slots) for the SilverStone SG13.

Length304 of 270 mm34 mm over

Height137 of 129 mm8 mm over

Thickness2 of 2 slots0 slots spare

Exact measurements

Size	NVIDIA	SG13	Room
Length	304 mm	270 mm	34 mm over
Height	137 mm	129 mm	8 mm over
Thickness	2 slots	2 slots	0 slots spare

SilverStone's published spec

Questions

Does the NVIDIA GeForce RTX 5090 Founders Edition fit in the SilverStone SG13?: No. The NVIDIA GeForce RTX 5090 Founders Edition is 34 mm too long and 8 mm too tall and no thickness to spare (2 of 2 slots) for the SilverStone SG13. Length 304 of 270 mm, height 137 of 129 mm, thickness 2 of 2 slots.
Where do these numbers come from?: SilverStone's published spec; card size from NVIDIA'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: SilverStone’s SG13 specifications, checked October 24, 2026. SilverStone lists cards up to 270 mm long with a 129 mm width (height) restriction, in 2 expansion slots.
Card: NVIDIA’s spec page, checked October 23, 2026. NVIDIA publishes the slot count, not a thickness in millimetres, and asks for room for a 3-slot (61 mm) card for airflow.
A front radiator needs the upper drive cage removed and cuts the room for the card.

This card in other small cases

The card’s size, and all 25 cases

Other RTX 5090 cards in the SG13

Check another pair with the fit checker.

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