Hi, I am a new comer. I just want to say thank you to the author of this thread, for teaching how to Bifurcate the PCI-E slot by BIOS mod. I follow the guide and it works!
I can confirm Asrock Rack D1541D4U-2T2R can make bifurcate of the 2 PCIe buses (physically one long and one short, but electrically they are both 8x PCIe 3.0) . The bifurcation setting just hidden and can be enabled by easily mod of the BIOS. I tested by a 2 slot M.2 to PCIe adapter.
The method is here:
- Use AMIBCP to load the BIOS, find the IntelRCSetup → IIO, change “PCIe4 link width” , “PCIe6 link width” and “IIO0 Configuration” Access/Use to “USER”.
- Save, flash the BIOS
- Go into the BIOS and find the option, change to “x4x4” and “x4x4x8”
- Enjoy.
modded BIOS can be download here (DO IT AT YOUR OWN RISK):
