Image: Gigabyte. Both Nvidia and AMD switched from blower-style to axial-fan coolers for their in-house reference cards in recent years, and it was a good decision.

GeForce RTX 4090 axial fans used to cool a CPU, image credit: Chiphell. Mounting is a pure DIY deal, and in keeping with the spirit of the GeForce RTX 40 Series, they use a custom 6-pin ribbon ...

The Radeon RX 6000-series cooler teased on Twitter packs not one, not two, but three axial fans in its shroud, along with a much more aggressive-looking design and a pair of 8-pin power connectors.

Featuring a smart thermal control, the OA109AP111TB03 (TEMP Control) Series AC axial fans employ a ball-bearing design, measure 120 mm x 120 mm x 38 mm, and provide airflows of 63.3 to 96.7 CFM ...

Squirrel cage fans are available in 12v DC, I've found quite a few in surplus shops as well as on-line on manufacturer's sites.<P>I think the key difficulty is in mounting a squirrel cage fan.