I am having a really hard time finding a mainboard for my new server. I will run multiple M2 and U2 drives, so its needed 4x4x4x4 support. To keep the costs down I was initially thinking to reuse an «old» computer that has the ASUSTeK COMPUTER INC. ROG MAXIMUS XI HERO (WI-FI) , Version Rev 1.xx mainboard and a Intel Core i9-9900K Prosessor (Socket-LGA1151, 8-Core, 16-Thread, 3.60/5.0GHz, Coffee Lake Refresh) and it feels a bit waste of throwing it away, but again it doesnt support.

The requirement say this: «To ensure compatibility with MB699VP-B V3, please make sure that your add-on card or motherboard’s BIOS/UEFI supports PCIe Bifurcation when using a PCIe 16x or 8x slot. Additionally, set up the PCIe splitter in the BIOS/UEFI with the configuration of x4, x4, x4, x4 for a PCIe 16x slot or x4, x4 for a PCIe 8x slot.»

Can anyone please help me finding a motherboard, that preferally can support the CPU, so I just have to replace the motherboard. If that is not possible, please suggest a motherboard that can support this. As I will be running PLEX AMD is not really the best thing, but if AMD gives more bang for the bucks I can happily run Plex on its own mini pc that I have.

So to sum up.

1. Help me find a mainboard that support Bifurcation (4x4x4x4) for socket LGA1151 with 9th gen I9 or
2. Help me find any mainboard that support Bifurcation (4x4x4x4) or
3. Give me an AMD alternative that supports Bifurcation (4x4x4x4) or
4. Any other options, like extension cards that can emulate (4x4x4x4) on a x16 slot

I am having a really hard time finding a mainboard for my new server. I will run multiple M2 and U2 drives, so its needed 4x4x4x4 support. To keep the costs down I was initially thinking to reuse an «old» computer that has the ASUSTeK COMPUTER INC. ROG MAXIMUS XI HERO (WI-FI) , Version Rev 1.xx mainboard and a Intel Core i9-9900K Prosessor (Socket-LGA1151, 8-Core, 16-Thread, 3.60/5.0GHz, Coffee Lake Refresh) and it feels a bit waste of throwing it away, but again it doesnt support.

The requirement say this: «To ensure compatibility with MB699VP-B V3, please make sure that your add-on card or motherboard’s BIOS/UEFI supports PCIe Bifurcation when using a PCIe 16x or 8x slot. Additionally, set up the PCIe splitter in the BIOS/UEFI with the configuration of x4, x4, x4, x4 for a PCIe 16x slot or x4, x4 for a PCIe 8x slot.»

Can anyone please help me finding a motherboard, that preferally can support the CPU, so I just have to replace the motherboard. If that is not possible, please suggest a motherboard that can support this. As I will be running PLEX AMD is not really the best thing, but if AMD gives more bang for the bucks I can happily run Plex on its own mini pc that I have.

So to sum up.

1. Help me find a mainboard that support Bifurcation (4x4x4x4) for socket LGA1151 with 9th gen I9 or
2. Help me find any mainboard that support Bifurcation (4x4x4x4) or
3. Give me an AMD alternative that supports Bifurcation (4x4x4x4) or
4. Any other options, like extension cards that can emulate (4x4x4x4) on a x16 slot