Sam440 ep flex & pcie bridge: 66MHz mode

Hi!

I'm going to buy a RadeonHD card for my Sam440 flex and install it via a PCI->PCIe bridge. It seems for me, that under AmigaOS 4, all those bridges will work only in a 32bit x 33MHz mode. Am I right?

It would be nice to utilize the whole PCI66 bandwith. Could someone recommend me a nice bridge that should work in the 66MHz mode (even though not supported by AmigaOS 4 now)?