With version 3.3 of the BIOS, the X9SRL supports bifurcation. But, it's not just bifurcation...it's actually re-arrangement of the PCIe lanes.
Every slot seems to have all PCIe lanes wired to it, even if the active slot width when the board was made (and bifurcation wasn't really a thought) was fewer lanes. In other words, some of the the x8 and x16 slots can be re-mapped to use the full x8 or x16 lanes, even though the default for the slot might have been x4 or x8.
On the board, slots 2-4 have x16 lanes grouped, slot 5 has x8 lanes, and slots 6-7 have x16 lanes grouped. You can re-arrange the lanes assigned to each slot in a wide variety of ways (see picture). The only things you can't do is set the x16 lanes to x4x4x4x4 (and it isn't really necessary, anyway), slot 3 can't be x8, and slots 2 and 3 can't be x4x4.
This makes the board amazingly versatile.
So, my question: do the X10, X11, and X12 motherboards with similar slot setups (6-7 slots, with a mix of x8 and x16 physical) support the same versatility of bifurcation in the BIOS?
Every slot seems to have all PCIe lanes wired to it, even if the active slot width when the board was made (and bifurcation wasn't really a thought) was fewer lanes. In other words, some of the the x8 and x16 slots can be re-mapped to use the full x8 or x16 lanes, even though the default for the slot might have been x4 or x8.
On the board, slots 2-4 have x16 lanes grouped, slot 5 has x8 lanes, and slots 6-7 have x16 lanes grouped. You can re-arrange the lanes assigned to each slot in a wide variety of ways (see picture). The only things you can't do is set the x16 lanes to x4x4x4x4 (and it isn't really necessary, anyway), slot 3 can't be x8, and slots 2 and 3 can't be x4x4.
This makes the board amazingly versatile.
So, my question: do the X10, X11, and X12 motherboards with similar slot setups (6-7 slots, with a mix of x8 and x16 physical) support the same versatility of bifurcation in the BIOS?