>> I'm not sure if that means two x4 Gen 4 slots or four x4 Gen 3 slots,
>> or if all options are Gen 3.

>I guess they mean the latter. Bridging an x8 gen4 slot into two x4 gen4 slots should be possible as well, >of course, but someone would have to actually test such card with the board.

That does seem likely, and the comment about four x4 slots probably doesn't mean four x4 slots that have all lanes connected (unless they are talking about a switch).

But its beginning to look like a simple x8 to dual x4 split might be possible.