A while back my MSI Tomahawk B450 took a hit during a move, and needed to be replaced. I found an Asus Gaming B350-F for cheap and it seemed to support my CPU, so I went ahead and snagged it. When I updated the EFI I got a pleasant surprise: Resizable BAR was fully supported and enabled.
But I did have a few questions about this. On such an old platform is the ReBAR feature fully utilized? Is it as performant as say an AM5 implementation?
This is more idle curiosity than a pressing concern.