https://wccftech.com/asrock-radeon-rx-6400-mini-itx-graphics-cards-spotted-designed-for-oems-si/

It's easy to forget that AMD Radeon RX 6500 XT isn't the only Navi 24 GPU-based graphics card out there as the RX 6400 exists too. The other graphics card is purely designed for OEMs and SIs but it looks like manufacturers are still going to offer them in custom flavors.

The ASRock Radeon RX 6400 Challenger ITX 4 GB graphics card was spotted within EEC database by KOMACHI (via Videocardz). The graphics card has the 'RX6400 CLI 4G' product name and comes with the same design as the Radeon RX 6500 XT but has a cut-down Navi 24 GPU core along with all the cut-down features that the chip comes with.