Is anything not checked?

NZXT doesn't publish a height or thickness limit for the H5 Flow, so those aren't checked.

Where do these numbers come from?

NZXT'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 H5 Flow

Will it fit

Does the Gigabyte GeForce RTX 5090 Gaming OC 32G fit in the NZXT H5 Flow?

Fits

Yes. The Gigabyte GeForce RTX 5090 Gaming OC 32G fits the NZXT H5 Flow with 68 mm of length to spare.

Length342 of 410 mm68 mm spare

Height152 mmNot published

Thickness≈3.44 slotsNot published

Exact measurements

Size	Gigabyte	H5 Flow	Room
Length	342 mm	410 mm	68 mm spare
Height	152 mm	—	Not published
Thickness	≈3.44 slots	—	Not published

NZXT's published spec

Questions

Does the Gigabyte GeForce RTX 5090 Gaming OC 32G fit in the NZXT H5 Flow?: Yes. The Gigabyte GeForce RTX 5090 Gaming OC 32G fits the NZXT H5 Flow with 68 mm of length to spare. Length 342 of 410 mm, height 152 mm (no published limit), thickness 3.44 slots (no published limit).
Is anything not checked?: NZXT doesn't publish a height or thickness limit for the H5 Flow, so those aren't checked.
Where do these numbers come from?: NZXT'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: NZXT’s H5 Flow specifications, checked October 24, 2026. NZXT lists cards up to 410 mm long for the current H5 Flow (older 2022 units: 365 mm); no height or thickness limit.
Card: Gigabyte’s spec page, checked October 23, 2026.
A front radiator cuts the length limit; NZXT says by up to 60 mm.
The 2022 H5 Flow takes cards up to 365 mm.

This card in other mid-towers

The card’s size, and all 25 cases

Other RTX 5090 cards in the H5 Flow

Check another pair with the fit checker.

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